General Motors recently announced a wide-ranging safety recall involving the naturally aspirated 6.2L V8 L87 gasoline engine, affecting nearly 600,000 vehicles in the United States. While the recall addresses two potentially serious mechanical defects that can lead to engine failure and a loss of propulsion, GM has confirmed that the recall is not related to the well-documented valve lifter problems experienced by some owners.
As covered previously, the new L87 engine recall impacts a wide array of full-size GM vehicles, including GM trucks and SUVs built between the 2021 and 2024 model years. Among the affected nameplates are the Chevy Silverado 1500, Chevy Tahoe, Chevy Suburban, Cadillac Escalade and Escalade ESV, GMC Sierra 1500, and GMC Yukon and Yukon XL. In total, 597,630 units are impacted in the U.S., with global recall figures approaching 721,000 units.
The recall identifies two specific manufacturing defects at the supplier level, namely potential contamination leading to rod bearing damage, and crankshafts that were either improperly finished or otherwise out-of-spec.
However, GM has now clarified that the new safety recall is unrelated to potential valve lifter failure. For those who may have missed it, lifter issues have been reported across numerous V8-powered GM vehicles. Those issues are particularly prevalent in engines equipped with Dynamic Fuel Management (DFM), including the 5.3L L84 and 6.2L L87, as covered in countless owner forum posts, as well as GM service bulletins.
As for the current L87 recall, vehicles will be inspected to determine if they exhibit either of the known manufacturing defects (rod bearing damage, out-of-spec crankshaft). Engines that pass inspection will undergo an oil and filter change using 0W-40 Mobil 1 Supercar oil, replacing the 0W-20 oil specified previously. A new oil fill cap will also be installed. To note, non-defective engines that pass inspection will also qualify for a 10-year or 150,000-mile extended warranty. Meanwhile, vehicles equipped with a defective engine will receive a full engine replacement, but not an extended warranty.
Comments
so if DFM is disable does this save the lifters ?
Enough is enough with this AFM/DFM garbage!! Ford learned their lesson really quick with their 5.0L that had this feature….they had many issues in the 3 year run, and then scrapped it., because of all the issues relating to it..
Gm’s new Small Block V8’s better learn from this generation and scrap it as well. My truck runs so much better with it tuned and AFM off.
Funny when people respond with either A, not doing any homework or B, just lying to fluff their own view. Ford still uses it, they didn’t pull it after a few years and theirs has had very little noise of any issues. The GM noise is really minor, only reason it gets noise is because it is a newer technology that adds a level of complication in order to meet government emissions and mpg goals. Old guys hate overly complicated things but when it helps save money and the environment, I am ok with it, especially if it helps keep the V8 around a little longer. Without it, we may not have a new gen…
The AFM/DFM isn’t garbage, it works exactly as it was designed to do and 3rd party testing has shown its benefits. Are there some failures? Yes, there have also been regular lifter, pushrod and rocker failures on non AFM/DFW engines over the years. If the failure rate was high, there would be a recall. This large recall of the 6.2 was because it was above 4%. Haven’t I mentioned in the past above 3% is usually the threshold for large company recalls? Boom… The AFM/DFM failures are far less, but lets make a mountain out of a mole hill with false info and lack of homework?
@TMI
Again you are wrong, you constantly sit here and try to claim AFM and DFM are good. But they are not. Any one with common sense, mechanically inclined, and alittle information knows that shutting down an engine on one side or 1, 2, 3, ect…at a time is not good for the liters, rockers, and lobes on the cam shaft. Also, go to GM truck forums, which I belong to, and there are a plethora of guys on there with AFM/DFM issues.
Again, I recently read an article that stated ford is no longer using cylinder deactivation on their 5.0L. Also, go to their forums and see how many issues they are having. Do some research before you try and 1-up me. You constantly fall SHORT!!!! Good day… #”NotEnoughInformation”
I dont care what the “Experts” say. Engineer or not, I disabled the AFM/DFM and my 21 Escalade runs much better with no noticeable change in gas mileage.
TNT is spot on….As for TMI? What rock you living under? GM builds trash drivetrains period. Lifter failure is immenant on GM’s V8’s. Anyone that doesn’t know that I feel sorry for. Maybe they’ve had some that have made it past warranty, but buying one of these cars, trucks, or SUV’s to actually keep more than a couple years would be an extremely bad choice. I’ve been plagued with GM’s trash for the last 15 years. This has cost me over $100k in upside down losses, ruined holidays, and family trips. 2014 Yukon Denali – shuttering trash 8 speed trans. 2013 Chevy Duramax – DEF debacle and CP4 defect nightmare. 2015 Cadillac Escalade – Lifter failure, deleted then known valve spring breakage taking out entire engine… would anyone ever buy another GM after this? Eff no! I now drive throw away Hondas and have to baby around my dmax whenever needed. This is disgusting. I truly wish GM engineers could be held accountable. They should take all their drivers licenses and make them take the bus. They should also drain their bank accounts and 401k as they have done to all of us.
*correction* was a 2015 Yukon Denali w/ trash known defective 8 speed trans. That GM doesn’t acknowledge.