What to Know About the NHTSA’s GM L87 Investigation
Norman Taylor & Associates
July 27, 2025
Key Takeaways:
- NHTSA is investigating more than 877,000 vehicles due to engine bearing failures that can lead to sudden engine seizure or failure.
- GM has issued a recall for nearly 600,000 vehicles with the L87 engine and is inspecting or replacing engines depending on damage.
- A class action lawsuit has been filed that alleges GM knew about the engine defects and failed to act in time.
The NHTSA is looking into failures in GM’s L87 6.2L V8 engine after numerous reports of serious issues in Chevrolet, GMC, and Cadillac vehicles. Many owners have reportedly complained about bearing problems that can lead to major engine damage.
So, what does this mean for drivers? In this article, we’ll break down what’s happening, which models are affected, what owners are saying, and what steps you can take if you’re impacted.
Why Is the NHTSA Investigating GM’s L87 Engines?
The NHTSA is investigating the L87 engine after nearly 878,000 vehicle owners reported serious problems. Many say their engine bearings are failing, causing the engine to seize or even break apart. What’s worse, these issues often happen without warning, making them a major safety concern.
This has raised concerns about the possibility of sudden engine failure while driving, especially at highway speeds, which can increase the risk of accidents.
Signs of GM 6.2L V8 Engine Issues
Owners of L87-equipped vehicles have allegedly noticed several warning signs of engine trouble. Some of the most common issues include:
- Rattling Noises
- Oil Leaks
- Loss of Power
- Engine Stalling
- Warning Lights
What GM Models Have the L87 Engine?
The L87 6.2L V8 engine is found in several popular GM models, and if you own one, you might be affected by the ongoing investigation. The following models come standard or offer the L87 engine as an option:
Standard Models
- 2021–2024 Cadillac Escalade
- 2021–2024 Cadillac Escalade ESV
Optional Models
- 2019–2024 Chevrolet Silverado 1500
- 2019–2024 GMC Sierra 1500
- 2021–2024 Chevrolet Tahoe
- 2021–2024 Chevrolet Suburban
- 2021–2024 GMC Yukon
- 2021–2024 GMC Yukon XL
Some earlier models may have the L86 engine instead, which is not part of this investigation.
What Are Cadillac Escalade Owners Saying?
Many Cadillac Escalade owners have shared their frustrations on forums and the NHTSA website. Their complaints have revealed a pattern of alleged engine failures that left them stranded or facing costly repairs.
Owner Testimonials
- Stalling on the Highway: One driver’s 2023 Escalade stalled at 70 mph on the interstate. After pulling over, they discovered the engine had seized, which then led to a long and frustrating repair process.
- Unexpected Engine Shutdown: Another owner’s Escalade completely shut off while driving, forcing them to navigate across multiple lanes of traffic just to pull over safely. The dealership later confirmed the engine had failed with no warning signs.
- Repeated Engine Failures: Some owners have had to replace their engines more than once, which added to the frustration and reported financial burden of owning one of these vehicles.
GM Issues Recall in Response to Pressure
In April 2025, GM announced a voluntary recall for nearly 600,000 trucks and SUVs equipped with the L87 engine. According to recall documents, dealers will inspect affected engines. If the engine passes inspection, GM will switch to a higher-viscosity oil (0W-40) to prevent future issues. If damage is found, the engine will be repaired or replaced at no cost to the owner.
Lawsuit Filed Over GM Engine Failures
A class action lawsuit was filed in 2025, alleging GM knowingly sold vehicles with defective 6.2L L87 engines. The lawsuit claims poor manufacturing processes, like issues with wrist pins, circlips, and crankshaft specifications, led to catastrophic engine failures, often at highway speeds.
Plaintiffs argue GM had knowledge of the defect but failed to issue a timely recall or notify consumers, putting drivers at serious risk.
What Are My Legal Options?
If you’re dealing with engine issues in your GM vehicle, it’s important to know your rights and what you can do next. Depending on your situation, you might have a few different options.
Class Action Lawsuit
The class action filed against GM could impact thousands of vehicle owners. Joining a class action can be helpful if your situation is similar to others and you’re seeking compensation for repair costs, lost value, or inconvenience.
Lemon Law Claims
In California, the Lemon Law provides protections for consumers who purchase defective vehicles. If your car has undergone multiple repairs for the same issue and remains unresolved, you may qualify for a lemon law claim, which could result in a replacement vehicle or refund.
While a recall alone doesn’t automatically provide grounds for a lawsuit, if the manufacturer fails to properly address a known safety defect and that defect causes injury or property damage, you could have a valid legal claim.
Because these situations can be complex, it’s a good idea to consult an experienced lemon law attorney who can evaluate your case and help determine the best course of action.
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