General Motors has announced a sweeping recall that affects nearly 600,000 vehicles in the U.S., targeting a variety of models equipped with the naturally aspirated 6.2L V8 L87 gasoline engine. The recall is tied to certain manufacturing defects at the supplier level, which could lead to a sudden loss of propulsion. Critically, all vehicles affected by the recall will receive extended warranty coverage, including those units that receive a new engine.
Previously, GM Authority reported that only those recalled vehicles that passed inspection would receive the extended warranty coverage. However, this is not the case, as every impacted vehicle, including those that receive a replacement engine, will benefit from the extended warranty coverage. The extended warranty provides coverage for 10 years or 150,000 miles from the original in-service date, whichever comes first.
The recall targets 597,630 vehicles in the U.S., with GM estimating a three-percent defect rate. That equates to approximately 17,929 replacement engines in the U.S. market. Globally, the recall targets around 721,000 units, with a projected 21,630 replacements required worldwide.
To determine if a vehicle requires a replacement engine, GM technicians are instructed to use a GM-branded PicoScope, which is a a digital oscilloscope designed to analyze engine sensor signals. Technicians use this tool in tandem with the specialized GM-60539 harness. Once a defective is confirmed, technicians can proceed with the engine replacement procedure, which can take between 18.2 and 18.6 labor hours depending on the specific model and drivetrain configuration.
Meanwhile, recalled vehicles that pass inspection will receive an oil and filter change using new 0W-40 Mobil 1 Supercar oil. In addition, vehicles that pass will get a new oil fill cap and revised documentation to match the revised oil spec.
Makes and models affected by the L87 recall include the following produced between the 2021 and 2024 model years:
Comments
That Mobil 1 supercar is not a cheap oil, owners are going to be in for a rude awakening when they need to pay for their next oil change.
Re: the cost of the new oil. Mobil 1 0w40 is usually easily available, and it costs the same as regular Mobil 1 0w20 or 5w30 oil. The European and the Supercar versions both meet the required GM DexosR specification. The old oil had to meet the Dexos1 spec, and that pretty much means synthetic. They’re less than $30 for 5 quarts at Walmart, or available with any oil and filter bundle at Advance / O’Reilly / etc…
I just checked Advance Auto and the 0W-20 Mobil 1 and the 0W-40 Mobil 1 Supercar are the same price at $11.99 per quart.
Ok but never buy oil by the quart and never buy it at an auto parts store. That’s the most expensive way. I just bought 5 quart jugs of Mobile 1 Dexos1 0-20 & 5-30 for $25, that’s $5 per quart. Same price at Walmart in a 12 quart pack. Get the filters on sale for $5-$6 and an oil change with good quality oil is less than $35.
Their best sellers with the highest profit margins and then this. Cheapest parts from the lowest bidder across all vehicle manufacturers these days. Sad. What happened to Quality and dependability after the sale? All these EPA requirements to stretch a few more tenths mpg from the power trains has also helped cause this mess, such as cylinder deactivation and stop/start at red lights etc.
GM advertising their engines only last 150,000 miles now? That’s not very promising, since people seem to get more than that already.
This is dumb. Just give them a lifetime limited engine warranty. You’re telling your customer we made a bad engine, and the new one isn’t as good as what we’ve made in the past.
I just bought a 2025 High Country 6.2, and it’s a little disconcerting the jerkiness and crazy sounds that come from it. If I didn’t have a 12 year old truck to compare it against, and didn’t know this was now the new “normal” for a GM V8 I’d swear my new truck has a serious problem. The Infotainment system seems to be half baked, it crashes all the time. Overall, it doesn’t seem like an $80,000 vehicle.
I guess this is to be expected, GM has been spending all its money chasing EVs. Something has to give.
If I were Mercedes or BWM or some company that has manufacturing in the US already and doesn’t make a Truck, I’d be looking into building one here.
I bought a 24 High Country last year. Same thing, the idle is just not smooth. Some days it just runs weird and bangs a gear randomly. I took it to Chevy they literally said that’s how these V8’s run. I’m pretty disappointed my screen also sometimes won’t load for over a minute be stuck on the Chevy logo.
That’s fair because they certainly have a very reduced trade value. So even though you are stuck with it, you are protected for a while.
Do you get a refund if you have already bought an extended warranty?
Great question
Got my notice last Monday. Traded my 2023 Yukon XL Denali with 28,000 on last Saturday before the trade in and resale value plummets.
You got lucky, I heard some dealers are already reducing trade in allowances or not taking them in trade at all.
Back at you Mel, that was a great question. I have another great question. I own a 2021 6.2L Trailboss. I had to have a complete engine replacement due to unbelievable oil consumption 17,000 miles. My Question is the replacement engine they installed is it good or bad. All this happened prior to this total recall???
I would check to see if the manufacture date is within the recall. If so, have the dealer do the test to see if you get another new engine or a 0-40 oil change and filler cap. Good luck!
Well my 2023 caddy got new engine in feb 2025 then 1500 miles later got another new engine so it would seem they are still putting in bad engines and can’t tell if they are good or bad Jeremy ramsey troy Indiana
I’d rather replace a $7,000 engine than a $125,000 Tesla battery!
I have a 2021 AT/4 1500 with 6.2 and 14ooo miles still looks as new I’m single and older guy should I do a trade in as I really like my truck or trade for the 2500 with 6.6 GM ?
My 2021 Silverado High Country just blew the 6.2L engine on a mountain highway, yesterday. I barely had time to move over to the outside lane and it came to a complete stop in the middle of the road just past a curve. It lost power and had no steering. It was crazy to see all the vehicles locking up their brakes trying to avoid it. Nothing I could and luckily no one got hurt. Towed it to the dealership and now I’m waiting for the diagnostic
Here’s what isn’t being explained…. At least I’m not seeing it. If it is a result of problematic parts and not experiencing the vibration, will the viscosity change actually prevent it from occurring in the future?
Higher viscosity oil can’t “prevent” it can only reduce the probability.
The existing lubrication works, (about 97% of the time, or 100% for the first XX?? miles, only GM knows – and its all dependent on usage).
I suspect someone at GM has extrapolated a predicted failure rate for the higher vis. oil, and that new failure rate no doubt factored into the warranty extension.
Currently own 2024 AT4X with 6.2 17000 mi. Changed my oil with 0/w40 super car. It’s expensive $12 quart, hard to find. Gas mileage hasn’t changed 19 mpg