GM is facing another class-action lawsuit related to the performance of its 8LXX eight-speed automatic transmission.
This latest lawsuit was filed in U.S. District Court for the Eastern District of Michigan and involves 2019 to 2022 model year Chevy, GMC and Cadillac vehicles that were purchased after March 1st, 2019, according to Car Complaints. Plaintiffs claim the 8LXX transmissions in their GM vehicles are prone to jerking, hesitation, surging and lurching while the vehicle is in operation and that GM has been aware of these alleged issues since as early as 2013.
8L45 transmission
Plaintiffs in this suit say GM has also worked to actively cover up the alleged problems and won’t honor past warranty agreements, despite the transmissions being covered by the automaker’s express warranty. Fine print in the warranty indicates GM’s warranty covers all manufacturing defects except for those related to “slight noise, vibrations, or other normal characteristics of the vehicle due to materials or workmanship occurring during the warranty period.”
This lawsuit applies to owners of the following GM products who purchased their vehicle before March 1st, 2021:
- 2019-2022 Chevrolet Camaro
- 2019-2022 Chevrolet Colorado
- 2019-2022 Chevrolet Silverado
- 2019 Chevrolet Corvette
- 2019 Cadillac ATS
- 2019 Cadillac ATS-V
- 2019 Cadillac CTS
- 2019 Cadillac CT6
- 2019 Cadillac CTS-V
- 2019-2022 GMC Canyon
- 2019-2022 GMC Sierra
Numerous class-action suits have been filed against GM over its 8L45E and 8L90 eight-speed automatic transmissions in recent years. GM Authority has covered these reported issues with the GM eight-speed transmission extensively and even called on GM to address the purported problems in an op-ed published back in 2019. Some GM vehicles have ditched the eight-speed transmission in favor of the newer GM 10-speed it co-developed with Ford, however certain models still use this transmission, like the 2022 Chevy Camaro, Colorado and Silverado, for example.
Four plaintiffs are named in this lawsuit, including three individuals that own a 2020 or 2021 model year GMC Canyon and two separate owners of a 2021 GMC Sierra 1500 and 2021 Chevy Silverado 1500.
Subscribe to GM Authority for more GM legal news, GM recall news, GM safety news, and around-the-clock General Motors news coverage.
Comments
The best part is they continue to use it even though they have a better option, all in the name of hopefully we can upsell to a higher trim because $5.
The 6 and 10 speed are solid. 6 speed for cheap work trucks and 10 for everything else and just move on. JFC.
The 10 is coming and was not just a bolt in in many cases.
The latter year issues are generally limited to a glazed converter but they are not common based on complaints on forums.
Before the new fluid complaints were common in many long threads. Today it seldom comes up on the. Colorado forum.
My 2022 Camaro RS Vert has the 10 and I love it so smooth you don’t feel the shifts.
I have a 2018 Colorado. It does the same thing. I’ve been telling them about it every since I bought it at each service. How do I get in on the lawsuit?
google it many class action lawsuits out on the transmission and the lifter issue on the silverados. 5.3
So is someone else going to say it or should I?
The A8 transmission issue starts in 2016 and carries over to 2019 as far as the TSB is concerned.
So the fact I bought my A10 SS in February of 2021. Does that mean I’m covered as well?
Long Story Short: GM knew about the design flaw and tried to cover their arse ahead of time.
#sarcasm
Actually started in 2015 , they still sell in some vehicles today , but with a catch in the warranty, saying we will cover bumper to bumper EXCEPT the shuttering in the tranny .
We have a 2015 Denali. All thr same problems.
The 6 speed transmissions in gm products are total junk. I have a 2017 GMC Sierra 4×4. Two tranny’s put in it in less than 8250 miles apart. Total junk. If you have a 6 speed or 8 speed get rid of it.
All you have to do is get a hold of a lemon lawyer in Sioux Chevy like I did they will try to lowball you but don’t accept their low offer go back with a counter offer and they will pay you to avoid having any further further problems trust me it works hook it up on YouTube there’s plenty of people that have done it and I’m telling you I did it myself you don’t have to wait for a class action lawsuit get a hold of a lemon lawyer they don’t charge you unless they win and Chevy will send you a settlement offer if you’re going to wait on a class action lawsuit it’s going to be like one of them other ones there’s so many of them vehicles I got sold to be lucky to get $3 out of it
What do you mean by “like Sioux Chevy”?
Sorry I meant sue Chevy. Look up lemon lawyer in your state and give them a call.
’17 CT6 with the 8 speed here, first car with the 8 speed, I’ve had the 6 and the 10, both great.
The 8 is a pile of dog doo, herky jerky and doesn’t suit the car at all, that 1-2 shift is real ugly at low throttle.
YM 17’s we’re in the middle of the fluid recall. One side affect that is not looked at as much is the the new 8&10’s, heck the 6 speed does this a little bit, are continuously measuring the shift quality and adjust to avoid clutch failure. Your otherwise well calibrated shift map got moved as the transmission suspected clutch wear and delayed shifts, increased boost force, and most importantly, newer transmissions apply pressure gradually to ease shift quality, so your transmission trying to adjust to what it perceived as clutch wear went back to 4 speed style hard shifts, but this time without accumulators.
Yeah 2017 Liz Silverado same
Same issues…..what can I do to get relief…2017 ct6…dealer flushing once and transmission sensor twice due to wrong part delivery (according to dealer…covered in warranty)..currently approximately 60’000 miles! Help!
Get rid of it. Nothing they do will help it out
So when can I expect my check…
I’m a firm believer that class action lawsuits need to be made illegal. 10 years ago I would have thought differently, but too often you get law firms with down time so they wrap up some clients all together with a promise of a quick buck and throw class act suits till one sticks. To me, that’s theft.
The 8 speed is a good transmission. Bad fluid has been an issue in 3 speeds, 4speeds 5,6,7, 8’s ETC. I got a 2019 traverse, 140k miles (high mileage for work) and did a fluid flush at 115 just to guarantee it will make me 300,000 miles. The dealership put crap fluid in it, voila, the 9T65, a transmission known for not doing the “Chevy shudder” now shifts like crap. Changed the fluid myself to ensure high quality fluid was used, bam! Fixed. Not a transmission issue however.
Yes these legal cases are just money generators for the legal firms.
They take a problem and claim to be for the consumer . They don’t expect to win they just want to settle then they take much of the settlement for their services.
Here is the truth on the 8 speed. The main issue was a fluid that did not work. That has been corrected and fixed most of these issues.
As for the 8 speed no it is not the smoothest at times but many trans missions are not. Even the best Turbo 400 had firm shifts and back in the day we wanted it.
I have an 8 speed and it was flushed for free by GM. No hassles not cost. Today it shifts very smooth accept when cold and the first 1-2 shift is firm but after about a half mile it is as smooth as the other changes.
Is it the best transmission. No but it is not worse than a number of others that also have shudder and erratic shifting. Honda, Toyota, Audi, Ford, Chrysler and more all have seen issues.
The adding of gears, moving to more electronics and the changes and additions of fluids has just complicated the transmissions today and it has left many issues for a number of years. Used to be we had 3 gears and two fluids.
This is all due to the mfgs trying to meet emissions and mpg regs.
If anything the EV cars may have other issues but transmissions to this point is not one.
@ Jake & C8.R
If you don’t like it leave my country communist, people have right in the USA move to china communist.
Himm if the name fits?
There are websites and Facebook ads advertising for people to join lawsuits . Yes it’s an industry , find the most minor complaint via bots that monitor social media and the. Recruit people to join your class action lawsuit. For a while I would earn $5 here , $10 there by joining these lawsuits advertised online. My one standard was I needed to actually use the product . Many of these lawsuits you don’t even need to provide proof of purchase.
I think if we had tort reform to where it is like in England. You can take it to court but if you lose you pay the legal cost of the other person.
This would stop the lawyers that take cases just looking for settlements and put a stop to them.
With legal cost so high to fight these fake cases they find it too often cheaper to pay them to go away, It is corporate black mail.
Care to quote Shakespeare?
2015 Silverado high country.6.2l,8 speed trans. Broken wheels leak air,transmission jerks, paint coming off in places and oil pressure relief valve failed destroying engine. I need advice on what help might be available.⁹
Do normal transmissions require you to make sure you have a firm press on the break when you come to a stop…to avoid lurching forward several feet and possibly hitting the car in front of you, or even worse, a person? Accepting these problems and just saying oh well is exactly what GM wants and why class action law suites exist.
This just happened to me today jumped into the van in front of me 2019 Silverado it’s a real problem I promise
So far mine is good after valve assembly replaced and the appropriate fluid installed. Sucks you actually hit something.
2019 silverado. Almost had this happen several times, truck waits till at 0mph then shifts into first sending it lurching forward. Little scary the first time it happened. It expect it now, so I don’t ram someone but shouldn’t even be an issue.
I have a 2017 Chevy Colorado Z71, and had transmission sitter early on. Chevy flushed the trans for no charge, and told me it should be corrected within 500 miles.
I now have 97,000 miles on my truck, and no transmission problems. It shift’s very well at all temperatures. Just like they said Bad trans fluid.
Agreed, Mobil has had a problem with the fluid for a while now and was going to get replaced as factory fill but, they have had a history with GM and did some smooshing and change was nixxed.
The chevy shudder…is remedied by boring out the 2 needle valves in transmission pump and sleeving it in steel with 2 new steel pins to alleviate fluid bypassing the worn aluminum housing.
Gee, I’ll get right on it tomorrow…..??
It’s not that easy. I bought a 2019 Silverado, 8 speed, 5.3L. Started hard shifting after about a week. Now in the shop for 3 days. Mechanic admitted “these chevy transmissions are crap” and will know today if I need a new transmission…problem is it will be the same kind so I can expect this to happen in a few years again. I am glad you found a solution but to paint with such a broad brush is not correct. I am not a mechanic and a few hours of research will show you there IS a problem with the transmission and GM is being slimy about it. Truck will be sold and will never buy another GM. I am even in the market for a Yukon for my wife and kids, but that will have to be scrapped.
Did your “mechanic” tell you why it needs a new transmission? What part actually failed? If he can’t answer those questions, you probably need a new mechanic rather than a new transmission. AAmco has made a living off of people that don’t get answers to those questions for decades.
He will today I suspect after he takes a focused look at it. He only tried the flush and reprogram yesterday, and since there was no improvement, he asked to keep it for a deeper look at it. I have to ask, why would you expect a local dealership service mechanic to know “what actually failed” when the entire engineering staff at GM can’t pin point it?….maybe they can, just don’t want to. There is enough data out there to show this isn’t a “local mechanic doesnt know anything” problem. Its an inherent problem that GM created and does not know how to solve. The mechanics didnt cause the problem that brought me in looking for a diagnosis. The same problems that many people are having.
I had my 2019 Silverado in the shop 5 times due to hard shifting lurching forward shuddering all they did the first time was change the fluid put it on the computer sent me on my way each time runs good for awhile . now it slips
truck has 30.500 miles on it unreal my dealer had there corvette tech look at i guess he is a trans expert he could not duplicate and issue . soon as i drove off the lot same thing I turned around and parked there they gave a loner
kept it two days . now it runs good for now .
Maybe your vehicle is ok but for the rest it’s not a fluid issue. 19 Silverado has major issues. Fluid changed to new fix. Did nothing ..torque converter changed due to metal shavings in fluid. Didn’t help. Truck still hesitate,jerk,slam into gear especially 2nd. Or drive from reverse when completely stopped before going into drive. Slips for 5 secs before grabs and lunges forward. Same at stop sign. Go to stop. It waits till about to almost a complete stop them slams into first and lunges forward. So no you are no correct the fluid is not the only issue
After I had the latest full empty and new Mobil 1 fluid put in my ’16 SS Camaro with the A8, it shifted awesome! Never had an issue since, no more shudder, no more issues!
GM not honoring warranty, big surprise!
I gave on buying GM products decades ago and have been happy ever since.
Kinda funny to post that in a GM forum.
2015 Silverado high country ,slow engagement , intermittent hard shift. Flushed and changed to Mobil one. Worked well for 6 myths. Problem returned .I had the fluid changed again .Since then oil pressure relief valve failed and now waiting 3 months for a motor. Not sure what to do.
I’m just tired of GM’s it’s “NORMAL” routine for everything from burning oil, to jerky transmissions, to electronic bugs, etc.
2016 Camaro RS 8 speed, transmission at first was shifting hard in low gears, then chevy replaced transmission fluid. After one year transmission harness was replaced out of warranty… $1000.
My 2019 Silverado RST has the 8 speed transmission
Its been back 4 times for slipping and hard shifting
It’s been to three different dealers all say is we reprogrammed it. And no problem found. Its getting
Old.
Try the Mobil 1 fluid. My Vette is now as smooth as my Buick!
The Flush works as long as the converter is not glazed, If it is that should also be under the 5 year warranty.
The flush fixed most of the issues reported. It should also be on the 5 year warranty.
I have had my 2019 silverado in the shop now 3 days. They would not return it to me yesterday after the flush and reprogram. They said its shifting ‘really bad’ now. I doubt it was any worse than what I was experiencing, they just finally reproduced the problem when THEY were driving. So, looking at replacement. We shall see. Bottom line, its GMs response to all this that has be committing to never buying another GM product.
I had my 2019 back into the dealer for the third time at three different dealers all they do is reprogram and send me on my way . Unreal might
Change over to Ram .
I have a 2017 GMC 4×4 doublecab. It has the 6 speed automatic transmission. What a piece of crap it is. Two transmission overhauls in less than 12000 miles. They should be recalled. I will never buy a GM product ever again.
2017 1500 Silverado 60,000 miles and from dead stop at light let off brake engine hesitation to drift forward and as soon as you apply gas pedal it JERKS into 1st gear also now no longer able to set cruise control.
robot 98, problem sounds like a blown fuse in the control circuit.
I am experiencing the same issues with my 2018 Chevy Equinox brought with under 100 miles. Issues started around 20,000, just hit 38,000. All GM has said is they don’t have fix. It’s clearly electronics. Issue are clearly connected to the stop start system which cannot be shut off. Right about now I would welcome a class action suit. Lemon law Attorneys are a joke out for themselves only not the consumer..
Equinox is the 6 speed – never heard of an issue with the FWD set up. Is yours the AWD configuration?
Using the correct fluid is one thing . . . computer programming is another. The Charger R/Ts I’ve rented, the ZF 8-spd worked flawlessly with many imperceptible shifts. Have to see them on the tach rather than feel them! The GM Silverado 8-spd (same trans) fells nice, feeling only the first few upshifts. If GM is really having an issue, it is really in the PROGRAMMING of the computer rather than the transmission itself, by observation. PLUS how they modulate the lock-up torque converter! Seems to be too much buffering in the ECM of engine/transmission inputs, which can generate some flaky performance issues.
People that gave you a thumbs down either don’t own a Silverado or know what the hell they are talking about or both. There is no way that an 8 speed transmission should constantly run at 2000 rpm at 70 mphh and jump to 2400 rpm at 71 mph. The programming is killing the transmissions.
This could actually be a symptom of a failing “lockup” torque converter.
I got rid of my 2ss and purchased a Mustang GT. That’s how bad they were!.
Allison….or 3 pedals… that’s it
Did you have any of the fluid changes done? What abiut TCM reprogramming?
Sure the 8 speed has its issues and everyone is quick to blame the product and gm. But has anyone ever stoped to think maybe the person doing the work just doesn’t know what he’s doing or care. We all know at any job no matter what industry, there are those who just don’t care about their job and do crap work. I work at a cadillac/gmc dealer and we get quite a few 8 speed concerns. Gm releases repairs and updated parts and we just follow procedures. After repairs transmissions rarely ever come back for the same concern. Quality work has a lot to do with it and not just blaming the product and gm. Just saying
I have been to three different dealerships same response from all three no problems found reprogram it and send you on your way so there are bad techs
At all three dealerships.
No “bad techs”, just techs following GM TSB stated repair procedures. No more, no less. If “no problem found” via GM computerized test equipment, then “no problem found” AND nothing the dealer can further do under the factory warranty, either. End of situation, according to GM. Unfortunately, NO customer wants to hear that! NOR does a good Service Writer really want to say that, either, but that is the corporate response.
One of the other posts mentioned “flushing”, which from what I understand, is TWO flushes with the new fluid. That’s a lot of fluid!
One of the other posts mentioned “overheating”, which seems a bit out of whack. Reason? Since the first 4L80E automatics, there has been a temp sensor in the transmission to detect such. IF the trans is pulling and the fluid temp gets above a certain point, the trans will try to cool itself by (basically) going into “N” when the throttle is closed. Which means “no engine braking via downshifts and such”. Many of our customers complained about that. Our then-service manager finally got GM Tech Assistance to admit to this sensor and how it controlled things. A real fix? We advocated the customers put the biggest aftermarket ATF cooler on their vehicles to keep the fluid from ever getting to the higher temp in the first place. END of problems!!! One friend’s transmission had been warranty-replaced twice, with the replacements doing the same thing. With that “history”, I find the “overheating” issue quite interesting AND that nobody (at the dealership level) had suggested adding an external cooler or similar. OR perhaps the factory coolers were under-sized for cost savings?
Class action lawsuits DO generate a lot of interest, whether for the attorneys or for those customers who did not get what they thought they were getting in their vehicles. Do NOT expect any big amount of monetary compensation, though. And it can be a long time coming, too. Even if it might be a voucher to use against the purchase of a new GM vehicle.
Consider that any GM re-programming of the computer cannot significantly change the orig program, but can tweak it a bit ONLY. Why? That’s the program the vehicle was EPA certified for emissions and MPG with. Any non-authorized changes might affect emissions performance, which can be a serious issue that GM could be liable for later on IF the vehicle might fail an emissions test later on. AND, the vehicle computers track EACH new re-program and de-program (of aftermarket programs).
SO, during the factory warranty period, the customer has to follow GM’s (or any OEMs, for that matter) orientations on repairs and maintenance. Unless they might decide “to go it alone” and void the factory warranty on that particular component.
Jeff I have had my 2019 to three different Chevrolet dealerships all three say the same cant duplicate the issue
reprogram and send you on your way I think out of three dealerships someone might know what they are doing
just saying.
I have a 2017 Camaro ss with the 8 speed auto , I have taken it 3 times over the past 4 years of ownership for the transmission, I get the hard 1-2 gear shifts , as well as the shutter at high speeds , and the hard jerking when put into reverse along with the knocking when downshifting at deceleration. All three times the fluid has been changed which remedies the hard 1-2 gear shift in certain situations but it always happens again , you have to continually press the throttle until you hit 2nd gear , the transmission harness was also changed , I dropped it off for a 4th time 2 weeks ago because of the hard jerking in reverse began to make a loud knocking noise, the dealer confirmed the fluid had metal shavings and had torque converter shutter and recommended a new transmission. So now it’s at the dealer for the same issues again . The problem is not all GM vehicles are affected the same , some people just have the shutter at high speeds , some like myself have experienced all issues , the thing is once you get your car back it drives fine until 1-2 weeks later, some folks don’t have a transmission problem ever again. GM could make this right by offering a trade rebate or incentive for people affected by this .. I don’t see why they don’t. I’ll keep my Camaro until the next generation mustang comes out then I’m going to make the switch over to ford.
No no no no no. Tell me this – if an automatic transmission is a sealed hydraulic system, then why does the fluid need to be changed or “flushed”? It’s not burning hydrocarbons like an engine and it’s not breathing in air or outside contaminants like an engine. So the only fluid “contaminants” must be from the transmission itself, namely the worn off friction material from the clutches and bands. So if the clutch packs and bands have shed all this friction material, why isn’t the transmission slipping or shuttering? Because that friction material is now carried within the fluid itself where it is still doing its job and still a vital component of the entire system. So then what happens when you drain the existing fluid and it’s accumulated friction materials and replace it with slick new fluid to work alongside the worn clutch packs and bands in your aging transmission? Surprise! The transmission suddenly begins to slip and shudder as the clutches engage. I’m sorry to break it to you but you’re shuddering problems and nothing to do with the type of fluid used. The fluid flush nonsense is a borderline criminal service pushed by the quick change industry and the idea has become so pervasive that it’s become a wildly held belief as as automotive knowledge in general has faded amongst the broader public.
I worked at a quick change oil place to pay my way through college. The correlation between transmission flushes on vehicles over 60,000 miles and subsequent shuttering became impossible to ignore. As I researched the issue I began to ask around “Why are we recommending this service?” I soon realized that this recommendation wasn’t actually based on anything other than a desire to upsell services. The mileage recommendations are completely arbitrary and chosen by people at a desk with no engineering degrees. I occasionally helped out at other short staffed stores and noticed that those that didn’t offer ATF flushes (didn’t have the equipment) oldly didn’t show automatic transmission flushes at a required service interval on the computer screen or customer paperwork. So the stores capabilities somehow impact recommended services for vehicles?
If you want your transmission to last 300k miles, get a transmission cooler, don’t let the transmission get above 210 or 215 degrees while towing and NEVER change your transmission fluid after 20 or 30K miles. I have a Chevy Avalanche with 350k and have spent the past 7 years towing a 28ft 9000lb camper all over the country. The transmission is as good as the day I bought it. Temperature kills trannies (transmission fluid more accurately) not dirty fluid. Remember, it’s a sealed hydraulic system.
This actually reminds me of a time last summer I stopped into a family owned quick lube place out in the middle of nowhere on a camping trip when the oil screen on our 5.3L was causing oil pressure to drop. The workers were really down to earth people that actually knew about cars (not just high school kids reading off a computer screen). Out of force of habit I commented that we did not want a transmission flush recommendation. I was surprised when they replied “Oh no, too mamy miles, we never recommend that on a car over 40k.” I followed up with them about this recommendation and they basically communicated to me that when the ATF flush service hit the quick lube industry they bought all the equipment like everyone else. What they found was the cars and customers they’d serviced for years we’re coming back in with transmission issues shortly after the ATF flush. Keep in mind that this is not a national chain, it’s a small town family owned quick lube with customers they know and that trust them. At a national place customers are a number and an ATF flush is an upsell quota that must be reached. For a local rural business customers are friends that literally put food on your table and ruining their vehicle transmissions for a $60 upsell is suicidal and unconscionable.
I own an auto repair shop. We do transmission flushes. The manufacture recommends them if you check the service requirements, you would see that. I have repaired many transmission problems by doing a flush on them. The filter does get dirty and restricts fluid from flowing through them properly. I personally owned a chevy truck that would not shift at all at times, because of a dirty filter. replaced filter and fluid, “fixed”. It had many miles on it. About 100,000. Transmission fluid does get broken down and dirty. Do a little more research and you would see that. BG products will guarantee your transmission if you use there product and do regular flushes. Depending on your mileage. Start doing the flushes before 50,000 miles, and they will pay you if your transmission fails. Also before 100,000 miles, but not as money if you start before 50,000 miles. But you must follow there guidelines. I’ve been in business for 40 years, and always want to do the right thing. Transmission flushes help more than they don’t. Same thing would happen to an engine, if you fail to change oil for a long time, then change it, it can cause problems to your engine. Transmissions that fail after a flush, just expose a problem that was going to happen eventually, most of the time. Open minded research, not biased research is more helpful.
Your correct my transmission issues started at 5000 miles on the transmission on a new truck I now have 21,000 miles still having issues.
Been to three different Chevrolet dealerships same thing at all three .
They say we put it on the computer all good see ya. Same BS
2015 gmc sierra denali 8 speed shudder and swifting problems went to 3 mechanics says its fine on there computer last time ever buying gmc i even took it to dealership told me no problem to it bs and expect us to pay 70k to 90k for the newers one hell no 😒
Good fluid from the start is key. Dump Mobil as factory fill.
Ryan, you are absolutely correct on automatic tranny over heating. I would like to add that the high heat causes a fluid brake-down creating a “varnish” like coating on the internal parts. This becomes a big problem when the very close fitting valves within the valve body get even a very thin coating, begin to fit too tight in the precision bores. The result is that in order for the valves to move, higher hydraulic pressure is required to make the valves move, if they move at all. A partial valve move can cause a “shudder” where one gear is not fully disengaged and the next gear not fully engaged. A delayed valve move that higher pressure suddenly “slams” a valve movement will cause a very harsh or “jerky” shift.
Also, clutch pack wear does cause a sludge like residue that must be trapped by the internal filter. That filter can eventually clog causing insufficient fluid flow and tranny malfunction.
Another thing, the modern transmission fluids are high in detergent such that a fluid change will partially remove some of that bad varnish. But, after 1 to 2K miles another flush is needed to flush newly contaminated fluid out and another internal filter change and valve body removal, disassembly, cleaning and re-installation.
BTW, not all Quick Change outfits or their people know how, or do not, drain the torque converter. Usually there is more fluid in the torque converter than the transmission itself. The same fluid passes through both.
My Silverado LTZ is a 2015. It also has the jerky shifts . More so I believe its has to do with active fuel management system. There heck of a bang and clunk when feathering or light throttle then when needing power stepping on the pedal . Theres a lag between shifting down and bringing cylinders back on board. I think this should not be happening in city driving conditions. The active fuel management should not activate. I find if I switch to 6 speed mode on the selector the problem is gone.
I have a 2019 GMC Sierra. Love everything about the vehicle EXCEPT the transmission. I have complained to the dealership on every service but they say “we have several complaints but there are no service bulletins and nothing can be down”. What?…. The problem is between first and second gear. Upon putting the vehicle in drive, it jerks. Then when you are driving and have to slow for stopped creeping traffic, it jerks, like it does not know what gear to be in. I now go to low, and manually put truck in second to keep this from happening until traffic starts moving. I just turned 20,000 miles, mostly highway miles. I would like to join this lawsuit as GMC made a faulty transmission. I’m more aggravated about the nonchalant attitude of GM. The dealership only recorded one of my complaints and every time I complain they give the same answer.
I have a new 2022 Silverado Trail Boss 8 speed and same issues as reported after I turned 2,000 miles on this thread. Dealer says after all 5 visits computer says all is good but they do see what I am talking about after test drive but no bulletin is out to fix it. I want to join the lawsuit!! It drives like crap. What a scam.
Same, I have a 2015 Chevy Silverado Z71 and always had a clunky, jerking, thunking shift to it. After my warranty expired, at approx 112,00 the flywheel separated and pushed metal thru the trans. This cost me $5,000 grand to have another rebuilt transmission with the same clunky issues. I will never buy another Chevy Truck after this bull crap. Probably by a Toyota next time but Ive always been a faithful GM customer until now.
Can’t happen. You’re either lying, don’t understand how a transmission functions, or both.
Had a 6 speed in a 2015 Silverado, POS was on my 3rd tranny by 90k. Mostly highway and never towed.. had the fluid changed on the first one at 50k and tranny failed about 6k later . On the 2014 to 2018 Silverado Facebook group just mention 6 or 8 speed tranny trouble and you won’t have enough time in a day to read all the comments.
The 6 speed has not been an issue for the most part. I would say most people with the 8 speed are going to experience problems. I like my 6 speed in my Yukon.
The continued saga of GM JUNK , cheap cheap cheap , bean counting. blown plastic interiors ,
My 2019 GMC Canyon has been giving me stalled 1st to 2nd shifts since I bought it in 2019. Had the dealership check it out and all they said was it felt normal to them….
GM stop hiding behind lawyers. Your an American Auto Manufacturer. Do you really thinks it’s wise to anger us by lying to our faces. My loyalty to your products is based on you doing right by us. 50 years of owning and supporting the Brand is now done. You and Disney and the rest have forgotten where you came from. And who put you there. Go sell Buicks to the Chinese.
I had a 2020 Silverado which shifted so hard I was afraid to drive it. Dealer reprogramed it, which didn’t help at all. What fixed it was trading it for a Ram 1500, best move I’ve made in a long time. GM just lost me as a customer.
My 2017 5.3l Lt Silverado 4×4 has hard shifts between 2nd and 1st downshifting when slowing down. It also makes a high pitched whistle after the truck has been driven for a while. When sitting in an idle position it sounds like a dog whistle. It’s faint but loud enough to echo off objects near the truck. Drive thru’s are the worst. Almost makes me want to turn the truck off. I crawled under the truck after reading forums stating it was an alternator issue and it wasn’t. The noise is the loudest right under the transmission where it bolts against the block. You can also here the pump inside. I took it to Chevy twice and they said they could hear the pump but claimed they couldn’t hear the whistle. They know what’s going on. Let’s not forget that Chevy took a buyout from the government and they know that if they refuse to make this a recall they can make everyone buy a new transmission. It’s beyond in professional. I even spoke with the corporate office in Michigan. The lady was rude and told me to pay the inspection fee and if it was a transmission issue to pay for a new transmission. That if it was a defect from the manufacturer they would consider possibly reimbursing me my money. The new transmission is 3600$ and then they told me it would be between 1500$ and 2000$ for labor. So basically I would have to have 6000$ to spare with no guarantee they would do the right thing by their customers. I have asked a few people I know with chevys dating between 2015 and even newer than mine if they have had similar problems. And to no surprise they have ALL had to buy a new transmission. So let’s just stop with the bs.
Had a 2018 Silverado we purchased new in 2018 until last week when I traded it in. 3 years in, it started driving like the Transmission was gonna give out. Shuddering like crazy as it went through all the gears up and down. Would even give big jerks at times. I was told it was not my Transmission. They did a flush, replaced the torque converter and it still ran like crap. Oh, but you need to drive it 3000 to 5000 miles for it to “relearn” (so basically hoping you drive it pass the manufacturer warranty?) The Silverado shudder is real and it’s “normal” according to the Chevy dealers. Didn’t drive like that for the first 3 years, but what do I know, I’m just a woman.
It started with the starter going within a year, which they replaced with the same crappy starter that all the tow truck guys are VERY familiar with. So of course, it went again 2 years later. But hey! Guess what! Bumper to bumper warranty replacement parts and work have no warranty. So if your starter was changed at 58k, under warranty and it goes again at 61k, your s.o.l.
FYI, they feel perfectly fine with people paying money to figure out what is wrong with their vehicle when they KNOW it could be the update they all need. But I was told, notifying every owner would take too long and be too much work. Not that the update fixed the problem to begin with.
This truck was so awful. I did end up trading it in at a time when vehicles are so overpriced just because I was sick of feeling like the damn thing was gonna give out on me at any minute. Driving it felt like driving an extremely old car on its last leg. Which I would have dealt with, if I had actually purchased an extremely old car for under 2k. At about $40k…hell no!
I will NEVER buy a Chevy or GM vehicle again.
my 10 speed is doing the samething only 1000 miles
What is best trans fluid now for these grenade money eaters….???
more GM issues !!
I noticed it shifting funny on the way home when I bought it I had had a 10 speed before no problems with it but it got totaled when I had fourteen thousand miles on it
I own a 15 Sierra Denali 6.2 w8speed & with 3K miles had fluid changed under warranty. 2 years later @ 5K miles started acting up again. GMC selling Dealer says out of warranty for the same problem, but said there new fluid would fix it this time. Cost me over $300. but I paid hoping for a fix. A week later I took a trip 300 miles round trip & it’s acting up again. Called GM complaint line & they said out of warranty, sorry. Now I have a garage kept 15 Denali with only 5,600 miles and I want to sell it but I don’t fell good about selling my problem to someone else. Never the less I bought a new Ram Longhorn & am 1000% happy with. After 50 yrs buying all GM never thought I would buy Chrysler/Ram, but have a Ram 1500 & a 18 Chrysler 300 S w/Hemi & love em both.
Ordered a 2019 Z71 Silverado LT 1500. I used to work at a Chevrolet-Oldsmobile dealer back in the 1970’s and always order my trucks the way I want them. The truck was nice looking and has a few minor flaws but the 8 speed transmission is definitely defective. Mine shuttered, jerked and surged, but the worst problem is when the transmission is cold and shifts from first to second gear it’s like getting hit in the rear end. This is totally unacceptable. Took it in and the mechanic said GM told him that my VIN was not one that was recalled but he did me a favor and talked to the rep and was allowed to replace the fluid which was supposed to fix the problem. It did not fix the problem at all – in the meantime GM denies there is a serious problem.
When I bought my Yukon back in 2016, the service manager at the dealership told that I probably wouldn’t like how the 8 speed shifts. The 6 speed that is my SLT has had been around longer and much more reliable. So far I have had no issues with it and it shifts very smoothly.
My 19 Stingray has 804 miles on it. I bought it new. When I drove it off the lot light on the gas 1-2 shift was WTF? Slip and engine race till into second. Light throttle from 1 to 2 is really weird. Medium or more gas and it shifts well. Hope it gets an extended warranty out of this lawsuit.
I have a 2016 CT6 and i have the same things going on at low rpms at take offs
I have a 2019 Silverado had the jerking ,slipping transmission, I told my dealer numerous times he said nothing wrong he says he never heard of transmission problems in the 2019 Silverado .
ATF does get broken down IF it overheats. Hence the recommendation for a transmission cooler. Keep the fluid under 215° and it will last indefinitely.
An automatic transmission is a sealed hydraulic system. How does it get “dirty”? Automatic transmissions don’t even have drain plugs. You have to drop the entire pan, remove and replace the gasket then gain access to the flexplate to separately drain the torque converter. What does that tell you? Many modern automatic transmissions don’t even have a dipstick. If you want to do a fluid change at 30k miles to clean out any suspended metallic material from the initial break-in then so be it but after that point the particulates that you are flushing out are from the bands and clutch packs which operate “wet” and depend upon the friction material to properly engage. Honestly even flushing the transmission after the initial break-in is not necessary because automatic transmissions have a magnetic filter to screen fine metallic fragments from the fluid. Please back up your opinion with actual data or a least a decent description of the mechanical basis of your opinion as I have.
Also, this claim is the same non-sense excuse used by quick lube places after customers complain of shuttering or slippage after a transmission flush:
“Transmissions that fail after a flush, just expose a problem that was going to happen eventually”
It’s a great excuse because there’s no way of proving or disproving it. So tell me, what “existing problems” would new fluid expose other than worn clutch packs and bands? Please tell me.
I’m also interested in knowing how changing the oil on a engine that was overdue an oil change can damage it?? Surely someone with decades of experience would run an oil flush treatment to break loose sludge before draining and replacing so it doesn’t clog any screens, pickups, oil passages, etc. Right?
So, if your Silverado also has peeling paint does this mean that you will be eligible to get screwed twice as much by the lawyers and gm?
I have a 2021 Colorado Z71 CCSB 4WD, V6 8-spd. I bought it April 12, 2021. I 1000% experience the jerking and hesitation. I find this especially noticeable early on in the day, mostly going from D to R/vice-versa, or from 1st to 2nd gear. The cold also seems to negatively effect performance. According to the doc, I’m a month short of qualifying. That’s BS, no?
The 6 speed in my 2017 GMC Sierra is junk. The best transmissions gm ever built was the turbo 350 and 400. The rest are junk no matter what an professional transmission mechanic says. The guy that had rebuilt my tranny 2 times has bending it for 50 plus years. He says they are junk. The torque converters are junk to. They don’t last 10000 miles and glaze up. Then it contaminates the whole transmission. Gm needs to get with it. They s**k.
Cylinder deactivation is the root problem. The jerking feeling is from premature torque converter and pump failure. This blame comes from cylinder deactivation. Each time the engine kicks out of 8cyl mode to 4cyl mode it unlocks the torque converter, increasing heat from friction. Metal from the converter wipes out the pump. Cyl deactivation has nothing to do with fuel economy. It’s to keep up with increasing emission standards. Program out cyl deactivation the problem is solved. I have a hard time solely blaming the manufacture when hard to meet govt mandates are put in place. Makes sense when you think about GM throwing in the towel and going all electric before out infrastructure is even ready to handle the load, not to mention the waste.
I can’t drive a Mercedes. I have to have a 4×4 truck for my job. I should have bought the dodge. My wife’s jeep grand Cherokee laredo has a Mercedes transmission in it. 165 thousand miles and no trouble.
Everyone has theories and ideas but the trouble here was the fluid. That is what caused the shudder.
Many of todays transmission fluids are now absorbing moisture and the moisture is playing havoc on the convert lock up clutch and letting it slip hence the shudder. The fluid also has soften the shift point.
The Complaints about the hard shifts and the like are just subjective. These things were there when you took your first test drive. If you failed to notice it then that is on you.
GM is far from alone on the shudder issue as a number of types and brands are dealing with the same issues.
One thing that has not helped is the adaptive tuning program. The transmission tries to read how you drive and adjust to your habits. The problem is for people that are not driving consistent this could create conflict.
Note too people used to oil guns and knives with Tranny fluid but no longer as with the moisture absorption this has degraded the use for that.
One issue too is the coolers in the radiator are at times prone to leak and seep water into the tranny fluid. Audi had big issues on this. Toyotas 6 speed is well know for crazy shifts and odd patterns.
The Cylinder drop feature is not really in play here as most of the time it is on full cylinders in most engines. Even if they drop you never feel them anymore.
My 2012 Silver, purchased new, has a 4 speed auto and still shifts like new, maybe l’ll keep it a while longer!
Owned a 2015 Corvette Z06 with the 8 speed automatic.
When you put it in gear it felt like a rear end collision and being kicked by a mule.
Took it Chevrolet dealership and it was in service for over 3 months ( summer ) and I was unable to drive it the entire time while they tried everything possible to repair it….I still had to make monthly payments while it sat on the lot and was unable to enjoy driving it.
GM finally replaced the transmission under warranty and never reimbursed me for the inconvenience of still making payments and not being able to drive it……
Seems the class action suit should cover all Corvettes from 2015-2019.
Owned a 2015 Corvette Z06 with the 8 speed automatic.
When you put it in gear it felt like a rear end collision and being kicked by a mule.
Took it to Chevrolet dealership and it was in service for over 3 months ( summer ) and I was unable to drive it the entire time while they tried everything possible to repair it….I still had to make monthly payments while it sat on the lot and was unable to enjoy driving it.
GM finally replaced the transmission under warranty and never reimbursed me for the inconvenience.
Seems the class action suit should cover all Corvettes from 2015-2019.
My 2017 Cadilac Escalade ESV had problem, I Took it
To dealership in near my house which is used to be Martin Cadilac website Ca they said is nothing wrong with the car still I have same problem with the same car now they asking me to change engine because of the high mileage since the car had 3000 miles on it I had problem with jerking, I love to Sue GM because of the ignorance😡
I OWN a 2018 CT6 3,6 engine, 8 speed trans – bought 4/18. What about my trans?
After reading all these threads, I have to chime in. I am a 63 year old dealership trained GM Transmission specialist with over 48 years in the business, Master certified for the last 40 years and I have built more transmissions for GM than most have ever seen. They all have there characteristics but since this thread is about the 8speed 8L45, 8L80 and 8L90, I have to say, I have worked on a lot but in comparison to all the other GM trans out there in the market place the 8spd is really the less likely to have to be overhauled or replaced in their lineup. The 8L’S have problems but they (95%) can all be repaired to customer satisfaction with all external repairs not having to pull the trans, internal harness failure consist of 75% of most seen concerns. The programming and adaptive learn concerns are critical to this trans satisfaction. Of coarse the Mobile One fluid type fault is also another aspect all together, GM owns Mobil One, back in 2015 Gm used Black label Mobile one in all the 8 spds produced for all their lines, Cadillac, GMC, Chevy ect, a lot of transmission’s across the board had TCC Shutter concerns, see GM TSB 18na355 Released January 17, 2019. GM had Mobile one change the design of the fluid from black label to blue label o accommodate the TCC slip with a slip agent that partially eliminated the affects of lock up but it also affected the other clutch packs in the trans, less slip makes for a harsher shift . What few know is that when it comes to GM’S warranty process, GM will not allow the dealership to stack repairs to one complaint on the RO. if the customer doesn’t complain about up and downshifts there are no repairs to it. A good trans technician with tell you this, he can only charge GM for the flush in which will fix the TCC shutter but it will affect thew shifts after a short amount of driving.
Another TSB 16NA411 AND 16NA412 depending on which engine you have address programming and adaptive learn process, and believe me if this process is not followed you will have complaints about the up shifts and downshifts.
These TSB’S say that it only effects 2015 and 2016 but I know from experience that its the same trans and programming as 2017 and 2018 and some 2019. The only difference is the fact that GM changed the amount of hrs the technician gets paid on the 17, 18 and 19’s, they changed the time from 2.7 hrs down to .7 therefor not as many techs are pron to perform these programs and take the time to complete the adaptive learn process as often. Its all about money. And while I am ranting, The 8spd is the best trans GM has ever come up with, I have lived it, if your 8spd is not performing well its because the TSB’S have not been followed to the letter and another fact is that most GM dealerships are not equipped with Certified Transmission techs, ya they may have a tech that has become certified as trans techs but its out of necessity rather than a tech wanting to become a trans tech for the income that one will make now days. Back in the day when I became a trans tech it was profitable. Back in the 70’s I worked for the larges Oldsmobile dealer in the nation and I was the highest payed tech in the shop. Now its hard to make a living at it because of the slashed time to complete the repairs, time consuming procedures and the complexity transmission techs , well there are not as many of us still around and the young kids getting into this business, well there are not many, a technician shortage.
Back to the 8spds, I could go on for instance, P0711 Trans temp faults, The tcm monitors the trans temp and if the reading is not stable the adaptive learn kicks in and changes the shift timing and quality, That is where a lot of you are having concerns, see service information document 3806989 for a P0711 whether the code is set or not that is the cause a lot of you can not get the shift results you are exception. You have probably been told that there are no codes therefor nothing is wrong with it. its normal. I disagree. If you get to the right technician he can fix it without having to replace or overhaul your unit. The stories go on and on but its time to go home so for now happy trails. Marshal Buzbee
All this to say, “GM has screwed up and they still wont take ownership”. How is the average consumer supposed to digest this and deal with a problem that is effecting their investment.
I got one for you. 2005 avalanche what a pos!! Lost transmission at 76,000 and then the engine at 85,000 Great. I contacted GM and they didn’t give a sh*t. Chevy man all my life but this will be my LAST GM !!!!!🤬🤬🤬🤬🤬🤬🤬🤬🤬🤬
2017 Camaro RS vert. Has an issue with shudder in shift but I believe it’s more of the 4-6 cylinder change issue. Does shudder in low rpm low gears when slowly accelerating but sounds more like cylinders not firing. GM says its operating normal so I just use paddle shift only as it doesn’t do it when in paddle mode. Of course that also cuts out the 4-6 cylinder switching. But what do I know. Lol
Buy a Range AFM disabler, they work awesome and cut out the AFM BS!
Gm needs to fire their engineers. Get someone who can build a damn transmission right. I have 100 thousand miles on a 2017 GMC Sierra doublecab 4×4 and 2 transmission overhauls in less than 9000 miles. Will never buy another GM product. I was a GM guy for 55 years. Never again. I can’t wait to see how many problems they will have with the 10 speed.LOL.
Borg Warner transmission in Muncie Indiana shut down. That was a source for GM’s best transmissions.
As others have mentioned, if you’re experiencing the shudder at light throttle the latest Mobil 1 is the fix in most cases.
As others have mentioned, if you’re experiencing the shudder at light throttle the latest Mobil 1 is the fix in most cases. These class action lawsuits usually go nowhere.
GM is so “Boomer.”
Maybe some of you heard the story about the 6 new 2019 corvettes leaving the Bowling Green assembly plant headed for Washington DC. The 8 speed trany failed in all of them before they got thru Ohio.
I have a 2021 Chevy Silverado RST 8 speed and it was fixed by flushing and replacing the valve body. The truck was jerking and lunging forward, it scared me a few times.
Is it still running well? I have a 2019 Silverado 1500 and the rep just texted me that the pan looked clean so they are going with a valve body replacement. This is after they tried flush and fill and reprogram and nothing improved. Same symptoms.
I know there is a class action lawsuit filed on GM over the 8 speed automatic transmission. They should have one on the 6 speed to. It is total junk. Mobile one didn’t help mine at all. The lawsuit will be thrown out of court..
That’s why I drive Mercedes.
My 2021 chevrolet silverado custom with the 8 speed was rebuilt by chevrolet. It went out at 1700 miles.
I have a 2016 Cadillac Escalade ESV with about 125K, I have been at local dealership for few times over the transmission, I lost my original warranty and paid for two transmission about 8K and my problem still there, I spoke to supervisor and finally he admitted there is a problem with the transmission the how it was pot together, they promised to fixed it, not sure if they will do it. I’ll see.
Yikes
The 2022 C8 wasn’t listed in the article for the lawsuit, but my own 100 mile corvette had a full transmission failure and had to replaced. Of course it had warranty but imagine a brand new corvette stalling in rush hour traffic, and it’s an auto… not a fun experience at all. By the way, it was taken in due to reverse not working before the major failure had occurred, which they said had been fixed and wouldn’t happen, then the whole rush hour auto stall thing happened.
500 miles after the replacement it seems to be fine but it was definitely an interesting experience, and 8th gear sometimes pulls on the interstate…
All I have to say is, gimme back my MANUAL.
As far as the slushboxes, after the requisite Intake, Carb., Headers, exhaust and wheels & tires, the very next thing everybody wanted was a Shift Kit. To get rid of as much “factory” slippage that will flat out kill a Trans. All the electric nannies are way overpriced when they fail.
Chevy owners should file a class action lawsuit against General Motors! This is crazy! My truck was 44,000 when I bought it and I just now have 133,000 miles on it. Complete front end parts replacement including steering box, blower motor for Air, universal joints, now air conditioning is shot. Also master cylinder and brake booster. Never again will I buy a gm
I have a 2018 high country transmission went out at 25,000 miles out of town of course took it to the dealership took Gm about three months before they realize it need a new transmission Now the vehicle back in the shop for collapse lifters witch Gm know about also I always was a Chevy man the problem that I’m having out of the new vehicle makes me want to go foreign right now
That’s funny I have had my 2016 at the dealer 3 times for jerking and nothing wrong they say ( it only has 42,000 miles on it and has done it since new)
My truck a Silverado 8spd did the same. It was lunging forward randomly and hard shifting. The dealership finally replaced the valve body and so 4000 miles later so far no lunging.
Really? I just got a text from the dealer service center where they are looking at my truck for same symptoms…hard shift and lurching when coming to a stop. They tried flush and reprogram but it was not better, so they kept it to look closer at the transmission. JUST got a text saying the pan looked good…no chunks, and are going to replace the valve body. Please let me know if you are still running smoothly after that same fix. I have a 2019 Silverado 8spd.
And we are supposed to trust these idiots with an all electric lineup. I’ll be watching with popcorn and marshmallows as the fires start erupting!
My truck a Silverado 8spd did the same. The dealership finally replaced the valve body and so 4000 miles later so far no lunging.
Considering that the 8-speed is used by Ford and Stellantis/Chrysler AND is the awarded ZF 8-speed everybody claims is “the best automatic ever built”, it is NOT a transmission issue BUT the way the transmissions are PROGRAMMED that is the issue. Our heavy-line shop foreman said that when we first were getting complaints (GM), he hooked up the scan tool and drove one of the vehicles in the shop. He noted that on the highway, the torque converter was in “50% lock-up mode”. That’s NUTS! This was early-on when GM was having torque converter issues, which were later addressed with a more robust torque converter.
GM 6-speed being “solid”? Of the last pickups we’ve had over the past years, they ALL have a delayed engagement when going from R to D, Even so long as to get a big jolt when it goes into D! It develops over time, in all cases, but in the first case, it was there from day 1.
SO, other than programming issues, I also believe that many of the complaints are due to customers not really knowing what’s going on when it happens. The multitude of gears is to make a geared transmission act more like a CVT, from my suspicions AND do it with engines which have little or less low-end torque AND in the name of fuel economy.
Certainly, there will be some toothing issues in the first model year or so, but warranty should have addressed that by now. Nobody asks “What have made the later ones act better than the earlier ones?” It’s a different world than when all we had were 2 and 3-speed automatics that worked great for everybody!
Firstly Ford does not use a RWD based 8 speed automatic in any of their vehicles. The Mustangs and trucks/Suv’s all use the joint venture Ford/GM 10 speed and the very basic 3.3 liter V6 F-150’s had a 6 speed automatic for a while but currently all use the 10 speed. It’s the FWD based Edge/Explorer/Bronco Sport/Escape that use an 8 speed transaxle which is basically a GM/Ford venture 9 speed with one less gear.
Second The ZF 8 speed unit that Stallantis uses is not related in any way to the GM designed and developed 8 speed automatic so there is more going on here that just programming differences. A customer not knowing what’s going on is irrelevant after they just shelled out 50-70 grand as what they are interested in is a reliable smooth shifting transmission not GM poorly designed junk! Glazed torque converters, fluid changes and other so called fixes won’t guarantee that these things will remain smooth shifting when the miles pile up. The fact that people are still writing in with issues on 2020 and 2021 models tells us everything we need to know.
So for 3 years, my truck was running fine and then I just decided it ran like crap????
No other vehicle I have EVER had for the last 30 years has EVER driven like $hit unless something was wrong. At which point, it was fixed. THIS IS UN-FIXABLE.
Oh, and EVERYONE who complains are just morons that don’t know how a freaking vehicle should run. Get over yourself. Should have had you buy my piece of crap.
The 6 speed transmission is still junk. GM should pay to have these fixed. 2 tranny overhauls in less than 9000 miles is a joke. Wait and see. The10 speed will be junk to.
Don’t buy any large GM product that has a 6 speed or 8 speed automatic transmission. They are junk. That is why there are so many used one at the dealerships.
You never fully understand how bad these 8speeds are until you drive your 2000 Jeep XJ for a week then go back to your 2019 ZR2 and drive it one day.
I have a 2017 Colorado and we have the same issue. Why is it only going back to 2019! They need to go back from the first year it started.
Gm tranny problems go all the way back to 2015.. some 2020 and 2021’s are having problems to.
I have a 2019 Colorado 6 speed, and so far, it has performed flawlessly. However, my 6 speed only has 7K on it. Now., last weekend I had to Fwr/Rev it a bunch to rock it out of some mud, so I’ll be watching carefully for the next few weeks to see if it is beginning to “squat”. Thanks for the feedback and info on this forum.
Mine was all highway miles.never been off road. 2 tranny overhauls in less then 9000 miles apart. I’m not impressed with GM at all. This king about getting a dodge
My 2017 CT6 had fluid changed less than 10000 miles… worked fine for about 20000 miles… started hard shifting and shudder again… now comes and goes… better in cold weather…. Any GM help or class action ?
My transmission went out about 4 months ago on colorado. They still have the truck. Im now having to buy a new car.
I have a 18 Colorado it done the same thing they flushed it for free so far is doing ok.
Bought a 2017 Chevy Silverado back in 2020. Transmission was never right. At the dealer service department as we speak. Transmission is gone. Only 72,000 miles. GM can go to hell! I’ll never buy another one of their vehicles!
GM transmissions are junk. The torque converters are junk. The 6 speed transmission is as bad as the 8 speed. My 2017 has had the tranny overhauled 2 times in less than 9000 miles. No transmission mechanic can tell me that they are good transmissions. Junk, junk.
The 8 speeds have too many flimsy moving parts in a small space. 6 Speed trannys are the limit in moving parts in a reasonable size case. Gasoline IC engines have a wide enough torque range that all those extra “gears” are a waste of time money and reliability.
I read more and more every day about GM transmissions. They are total junk. So I can imagine just how bad the 10 speed is going to be. More parts to go bad. Don’t buy one.
Gee ANOTHER lawsuit. I gave up on my Colorado last year and traded it in for a 2021 Ranger. I LOVE it. I dunno about these lawsuits, so I’m hurting GM the best way I can, by letting ALL my friends and family know about how horribly they treated me, and what a piece of JUNK my Colorado was. Never again GM!
yes. i have done the same. Will sell the silverado when it gets out of the shop this week. Already told my brother who called asking how I liked my truck (he is in the market for one, after having gone with a car for several years). I explained to him very clearly…do not by a GM truck. Maybe the problem is solved in newer versions, but this is how you can expect GM to respond to the NEXT problem that arises.
I have a 2019 Chevy Suburban, that was purchased in March of 2019 with only 3 miles on the odometer. After coming from out of town on this past Friday, June 10th, I experience excessive jerking and pulling on the way home. I took it to my mechanic, because I will not be able to get into the dealership for another week. I was told my transmission fluid is burnt and I will need to replace my transmission. The cost of all repairs is over $5,000.
Now I know a 3 year vehicle should not be having transmission problems now, this is ridiculous. I should not responsible to repair this problem, trusting that this vehicle will last me more than 3 years! Does anyone have any suggestions?
Royce, you should be covered under the GM full power train warranty on your
Suburban. This is normally for 5 years, and goes with new GM vehicles.
GM transmissions are junk. The 6 speed is worse 6the 8 speed. Now they have a 10 speed. I hear it is junk to. Never will buy another gm product. Back to Ford I go.
Royce call your dealer ask to speak to a service mgr your surburban should be under warnanty still
the motor and transmission is still covered 5 year 60.000 miles what ever comes first. any GM dealer will cover it.
Unless the vehicle has surpassed the 60,000 mile warranty threshold
I have a 2018 w same problems. Why aren’t we in the same class action lawsuit I wonder?
My 2017 GMC Sierra doublecab 4×4 has a six speed automatic transmission. Its been rebuilt twice in less than 9 thousand miles apart. There was a class action lawsuit on the 6 speed but a judge dismissed it because it wasn’t a safety hazard. He sited with GM.
GM transmissions are total junk. I will never buy another. If you own a GM truck get rid of it before you get 35 thousand miles on it. Im switching to dodge.
Waiting on a negotiation offer from GM arbitrator pertaining to Cadillac Escalade transmission and other issues , any suggestions ?
Roll it off of a cliff.
i cured my problems on my 2018 Sierra slt after 3 flushing and new fluid fills and still experiencing same old problems of shuddering and rough shifting GM decided to change torque converter and all computer adjusting it was supposed to be fixed, wrong it still had the same problems. I finally found the fix. I ordered a 2022 refreshed gm.slt with a 10 speed Transmission. it’s as smooth as glass, different truck. problem solved!!!!! that 8 speed is a piece of s###.
How do you sign up for lawsuit? Own a 2017 Chevy Silverado ltz 6.2L 88,000 had to Chevy dealer 2 times over transmission issue they kept reprogramming it. Truck ran out of warranty and now I had to pay $6000 to put new transmission in.
They know about it and don’t want to fix it.they continue to sell this tranny (8speed) and went as far as to change the warranty , now warranty is bumper to bumper except the shaky transmission,if it was Toyota or any other foreign car maker the government would force them to fix it like they forced Toyota to change the frame in some vehicles.my last GM product in my driveway.
I have a friend who has been rebuilding transmissions for over 60 years. Hes 93 years old and still comes to work every day to rebuild transmissions. He says Gm transmissions are the worst he had seen in over 60 years. The 6 speed is the biggest pile of junk GM made. The 8 speed is so bad they pul6it off the market. Now a 10 speed. All those parts in that small space. GM already having . It’s going to get worse. Any gm mechanic out there who tells you that their trannies are good is fool of sh*t.
Put a new torque converter on. Have the mechanic remove the transmission thermostat. The transmission will run cooler without it. The transmission should nevet run as hot as the engine temperature. I’ve had no problems since.
I have a tip for those of you who take your truck in to a dealer, for most any problem. Make the Service
Manager or at least the Service writer drive your truck while you ride with him.
It is pretty hard to deny there is a problem when they are driving it. It took me a few dealers to find a good one as well. Most of all don’t take NTP crap from them.
I Don’t think the GMC Canyon are any different in Canada but talking to the GM dealers here about the 8 speed issues they pretend to know nothing about the issues. But a few months later I am told to flush the transmission and use Mobil 1 Blue label oil and that will fix the issue. Okay, took it in and got charged $760.00 for the flush. Ok if the original oil was wrong why should I have to pay for the correct oil ? I have been driving my 2018 now since new as it is the only vehicle I have and now it’s off warranty with 160,000km. So I guess if the tranny falls out tomorrow I’m cooked. I’m 73 years old and had GM cars and trucks all my life and probably will own one more new vehicle before i’m gone but it will NOT BE A GM any more.
Had my 2019 Sierra in several times for the jerking ans shuttering, the dealer states they couldn’t duplicate my complaint, I traded this headache away in November 2022. Question is, can I join in this class action lawsuit and how
I have a 2018 Chevy Camaro with 90.000 miles on it.At around 40.000 miles I began to experience the famous 8 speed shudder.I thought WTF and took it to Jon hall Chevrolet in Daytona beach Florida where I purchased the vehicle.They serviced the transmission with new fluid and filter and it was great again. Now that the Camaro is no longer under warranty the transmission is very bad with lurching bucking ,etc.very undrivable. Jon hall says I need a new transmission WTF? At around 5000.00$ called GM and they said they would help with 10 percent Whoopi GM has not recalled their 8 speed because they don’t admit their is a major problem.WAY TO GO GM shuddering customers just like your piece of garbage transmission,goodbye forever jerks
Ok so where’s my fix? Where’s my money?
Did anyone of you tried the new ( transmission fluid mobil 1 ) and it works?