GM Authority has learned from sources familiar with the matter that General Motors product planners are considering development of a new GMC Sierra HD AT4X model to slot in above the “regular” GMC Sierra HD AT4. The new GMC Sierra HD AT4X would join the “regular” GMC Sierra HD AT4 in the heavy-duty pickup truck lineup, rather than replace it.
The 2023 model year will usher in a refresh for GM’s heavy-duty trucks, including both the GMC Sierra HD and Chevy Silverado HD. Per GM Authority coverage, early 2023 GMC Sierra HD prototype models are already out and about testing in public, with updates expected to include new exterior styling for the front and rear fascias, as well as an all-new and much-improved cabin space.
What’s more, the refresh will introduce powertrain updates for both the naturally aspirated 6.6L V8 L8T gasoline engine and 6.6L V8 L5P turbodiesel Duramax, as GM Authority was the first to report. Rumor has it the Duramax may be upgraded to produce a whopping 1,100 pound-feet of torque and more than 500 horsepower.
If General Motors does end up green-lighting the new GMC Sierra HD AT4X, it will feature a broad variety of off-road-ready equipment, starting with new high-clearance bumpers front and rear for improved approach angles and clearance. The greasy bits will be protected with durable skid plates that supersede those equipped by the “regular” GMC Sierra HD AT4, while the suspension will be more capable as well. To note, the current AT4 HD features twin-tube Rancho shocks.
Further upgrades will include front and rear e-lockers, as compared to the lone G80 rear e-locker of the “regular” AT4 HD, as well as even more rugged Goodyear Wrangler Territory MT tires – the same compound featured on the 2022 Chevy Silverado 1500 ZR2. The tires will wrap unique wheels as well.
Put it all together, and the end result should be a rather unique offering. At present, the “regular” Sierra AT4 HD rivals the Ford F-250 Tremor, while this new AT4X model would expand the lineup and take things a step further. To that end, GM is already testing a next-level version of the light-duty GMC Sierra AT4X 1500, as GM Authority covered previously.
We will keep our ears and eyes peeled for further updates, so in the meantime, make sure to subscribe to GM Authority for more GMC Sierra news, GMC news, and around-the-clock GM news coverage.
Comments
Only makes sense IMO. The F-250 Tremor has a 2″ lift and 35’s, hopefully the AT4X HD would as well. For those that don’t want additional clearance the regular AT4 would still be available. I’m just glad to have some HD news again, also glad they are still targeting 2023. Between the new interior and powertrain updates for both gas and diesel these should be very nice trucks!
Well, the standard at4 already has a 2” factory lift and I think 33s or 34s so they already are competing.
Only on 1500 trucks. HD at4 do not come with 2in lift from factory
Bob is correct, only on 1500s. IMO a 2″ level lift with a factory warranty would be great on the AT4X HD, it would better justify the price. You are right about the tire size, a 34 is currently used but a minor bump would give proper clearance for 35’s.
On a side note it doesn’t mention what type of shocks will be used. I wonder if there is a heavy duty version of the DSSV multimatics available or if a different route will be chosen.
Very nice trucks starting close to, if not exceeding, $80k!!!
Great looking truck I hope they build the AT4X… GM for life baby👍👍🏁🇺🇸
Get a life. Take the sticker of Calvin peeing on the ford symbol off your back window to it makes you seem real douchey.
In December, I was able to buy a brand-new GMC 2022 AT4 refresh, and I love it.
With gas @$4 a gallon who can afford to drive these things?
GMC can’t even deliver. We paid for a truck months ago and it is 100% complete. They can’t or won’t tell me when it’s coming. My warranty started all trials OnStar etc … Started and ended, it’s like we just gave away $86,000 plus. Horrible customer service they truly do not care. This will most likely get deleted like my FB post. Wouldn’t want anyone to know what they are doing to people. What a scam.
GM does not have a precise way to track incoming vehicles at the moment. Speaking as a dealership employee I can tell you that your dealer is likely not witholding information from you. Just know you are not alone, there are literally thousands of people who are in your position, this is the new normal. As far as completing a deal before the vehicle arrives without knowing when it will arrive, I am not sure I would agree to that. How did they convince you to do that?
They told me the vehicle was in transit. Supposed to be here on Jan 18. Listing vehicles as in transit is lying. Dealer blames Corporate Corporate says dealer. Mean while my bank wants the title and GMAC won’t produce it. So we are making payments and can default on our loan contract for not producing the title as collateral. If this is the new normal it is criminal. They are getting in vehicles to sell weekly. But not the sold ones! I bet the executives don’t have this issue. Sorry about the rant. We are not wealthy people. This was to be our retirement vehicle. Now it is something we pay for and can not use at all. Criminal behavior.
Well there is no 2 ways about it you are going through an unfortunate circumstance. We do things differently here at my store. Best of luck, I’m sure you will love the truck when it arrives.
Same game here in Colorado, on the train be here mid January. Loan Started, XM started, Payments started. Something about a 4200 code after a month no idea when or if it would deliver. Found a new 3500 through AutoNation waited 3-4 weeks after promised 1. Missing parts called can’t tell you how many times to get them to get it right. Insult to injury, GM Finance tells me I’m late on the first truck they didn’t deliver—- told them to go back and check the paperwork I already had a new 3500 , sorry on their part proceed with confidence! AN could care less! Great truck though!
I ordered a 2022 GMC 3500HD back on September 9th and as of the other day my dealer says it’s not even built yet….I paid for the truck in full already maybe it will be a 2023 model when and if it ever comes?????
This is an extremely frustrating time for customers and dealers, transportation and the coordination of it is a huge bottleneck currently. I fight this constantly trying to get answers and updates. I would suggest having the dealership you purchased from reach out to the GM Rep and see what GM can do to get you at the very least, subscriptions for XM and Onstar, they’ve helped our customers in this situation with those items.
These new trucks will be $90,000+
Out of control!!!
I think this could be successful and would look nice, would buy one if I won the lottery. What about a TrailBoss Silverado HD?…
$78,000 MSRP 2022 15000 GMC AT4X with dealerships asking for $86,000 great interior upgrade, just saw it today, waiting for the 2022 2500 diesel, I’m not paying over MSRP, I’ll find another vehicle if need be. The new interior is a “Must See” vehicle.
If GMC wanted to make a vehicle that thousands of us are waiting for they would make the new AT4 with a diesel capable of 350 plus horsepower and 800 pounds of torque and put it in a light 3/4 ton Yukon XL. We need the ability of of hauling 4 by 8 sheets of plywood or Building materials Once in a while , besides the protection of our luggage and sporting equipment protected and secure inside while we travel to our destinations . Many of us have 12′ dump trailers or RV trailers that the rental companies will not even rent to a 1/2 ton truck. So how can I pay the market price for a vehicle that isn’t capable to do all the jobs we need. Have the kids try to get to a cooler that’s locked up in the canopy from the back seat of a pickup; or try to turn around a Crew cab pickup that has an 8′ bed on a mountain road. The old Ford excursion could do everything that so many thousands of people are needing. GMC would be such a winner to come out with a with a 3/4 ton 4×4 SUV with power lay down seats down seats that would fill this void. This vehicle would appeal to both the husbands and the wives for for everyday use. Demand would far exceed the supply for many many years. Proof of this is looking up the demand for the older excursions that are still selling for 25 to $30000 for the 3/4 ton diesel SUVs. Please listen to us.!! The half ton Yukon X l’s or suburbans do not meet meet our needs.