By John Arthur 
If you own a recent Chevrolet Silverado, GMC Sierra, Cadillac Escalade, or one of the full-size SUVs from these brands, you may have heard about serious concerns with the 6.2L V8 L87 engine. Many drivers are now dealing with the fallout from reports of sudden engine failures, and this has led to a major consolidated class action lawsuit against General Motors.
This article breaks down the details of the GM L87 engine lawsuit in plain language. We will cover what the complaints allege, which vehicles are affected, the recall and its remedies, potential risks, and what steps you can take if your truck or SUV is involved. Our goal is to help you understand your options clearly.
Understanding the GM L87 Engine and Its Role in Popular Vehicles
The L87 is General Motors’ 6.2-liter V8 engine, known for delivering strong performance in full-size trucks and SUVs. It powers models prized for towing, daily driving, and luxury features alike. Owners often choose these vehicles expecting reliability and longevity from the powertrain.
Unfortunately, a growing number of reports suggest that some of these engines have manufacturing issues that can lead to premature and catastrophic failure. The problems center on components like the crankshaft, connecting rods, and bearings. When lubrication breaks down, it can cause the engine to seize or suffer internal damage, sometimes without much warning.
This situation has left many owners worried about safety on the road, unexpected repair costs, and the overall value of their vehicles.
What the Lawsuits Allege About the L87 Engine Defect
Multiple class action complaints have been filed against GM, and several have now been consolidated into one major case in federal court in Michigan. Plaintiffs claim that GM knew or should have known about defects in the L87 engines but continued to sell the vehicles without proper warnings.
Key allegations include:
- Defective crankshafts and connecting rods that fail to maintain proper lubrication.
- Sudden engine stalling or complete failure, even at highway speeds.
- Risk of a connecting rod breaching the engine block in severe cases.
- Inadequate disclosure of these risks to buyers.
The consolidated complaint details experiences from dozens of owners across the country. Many report hearing knocking sounds, seeing metal shavings in the oil, or losing power unexpectedly. Some vehicles reportedly suffered total engine failure with very low mileage.
Owners argue that these issues make the vehicles unsafe and diminish their resale value significantly. They are seeking compensation for repairs, loss of use, higher operating costs, and other damages.
Affected Vehicles in the GM L87 Engine Lawsuit
The problems primarily impact 2021 through 2024 model year vehicles (with some concerns extending to 2025 models as well). The affected lineup includes:
- Chevrolet Silverado 1500
- Chevrolet Tahoe
- Chevrolet Suburban
- GMC Sierra 1500
- GMC Yukon
- GMC Yukon XL
- Cadillac Escalade
- Cadillac Escalade ESV
Hundreds of thousands of these trucks and SUVs were built with the L87 6.2L V8. If you own one of these, it is worth checking your VIN against the official recall database.
The GM Recall: What It Covers and Why Some Owners Are Concerned
In response to complaints and a National Highway Traffic Safety Administration (NHTSA) investigation, GM issued a safety recall for certain L87-equipped vehicles. The recall addresses potential manufacturing defects in the connecting rod and crankshaft components that could lead to engine damage and loss of propulsion.
Under the recall, GM dealers inspect affected engines. Depending on the results, they may:
- Recommend switching to a thicker 0W-40 oil instead of the standard 0W-20.
- Replace the engine in more severe cases.
Many owners have criticized these remedies. They point out that replacement engines may come from the same production batch and carry similar risks. The thicker oil has also raised questions about potential impacts on fuel economy and long-term engine performance. Some drivers report ongoing issues even after the “fix.”
The NHTSA has continued monitoring the situation, with additional investigations opened after post-recall failures were reported.
Potential Safety Risks and Real-World Impacts
Sudden engine failure in a heavy truck or SUV can be dangerous, especially while towing or driving at higher speeds. Loss of power can make it difficult to maintain control or pull over safely. There have been reports of vehicles stalling in traffic or on highways, increasing the risk of accidents.
Beyond safety, owners face financial burdens. Engine replacements are expensive, often costing thousands of dollars even with warranty coverage. Many also experience reduced resale values as potential buyers shy away from vehicles with known engine concerns.
Daily frustrations include more frequent oil changes, monitoring for unusual noises, and uncertainty about long-term reliability.
What Damages Are Plaintiffs Seeking in the Lawsuit?
The class action aims to hold GM accountable and provide relief to affected owners. Common demands include:
- Reimbursement for repair costs and related expenses.
- Compensation for diminished vehicle value.
- Coverage for rental cars or loss of use during repairs.
- Possible buyback or replacement options for severely affected vehicles.
The outcome could set important precedents for how manufacturers handle widespread powertrain defects.
Steps to Take If You Own an Affected GM Vehicle
- Check for open recalls using your VIN on the NHTSA website or your GM dealer’s portal.
- Document any unusual engine behavior, noises, or warning lights with dates, mileage, and photos if possible.
- Schedule an inspection at an authorized dealer promptly.
- Keep records of all communications with GM and service visits.
- Consider consulting a lemon law attorney or joining the class action if you have experienced failures or significant issues.
Staying informed and proactive can help protect both your safety and your investment.
Long-Term Implications for GM Owners and the Industry
This situation highlights broader challenges in modern vehicle manufacturing and quality control. For GM, resolving these claims fairly will be important for maintaining customer trust in their flagship trucks and SUVs. For owners, it serves as a reminder to research reliability data before purchasing large-ticket vehicles.
Many in the automotive community are watching closely to see how the consolidated lawsuit progresses and what remedies ultimately emerge.
Conclusion
The GM L87 engine lawsuit brings attention to significant concerns affecting thousands of popular trucks and SUVs. While GM has taken steps through a recall, many owners remain worried about the effectiveness of those measures and the potential for future problems. By understanding the details, checking your vehicle, and exploring your legal options, you can make informed decisions moving forward.
If your vehicle has shown signs of trouble or you received the recall notice, do not hesitate to act. Early attention can prevent bigger headaches down the road.
This article is for informational purposes only and is not legal advice. Consult a qualified attorney for your specific situation.
FAQ
What is the GM L87 engine lawsuit about? It is a consolidated class action alleging that certain 6.2L V8 L87 engines have manufacturing defects in the crankshaft and connecting rods, leading to sudden failures and safety risks.
Which models are affected by the GM L87 engine issues? Primarily 2021-2024 Chevrolet Silverado 1500, Tahoe, Suburban, GMC Sierra 1500, Yukon, Yukon XL, Cadillac Escalade, and Escalade ESV equipped with the L87 engine.
Has GM issued a recall for the L87 engine? Yes. The recall involves inspection and potential oil changes or engine replacements for affected vehicles.
Is the GM recall fix considered adequate by owners? Many owners and attorneys argue the remedies are insufficient, as replacement engines may have similar defects and thicker oil brings its own trade-offs.
What should I do if my engine fails suddenly? Pull over safely if possible, have the vehicle towed to a dealer, document everything, and contact an attorney familiar with automotive defects.
Can I join the GM L87 class action lawsuit? Eligibility depends on your specific circumstances, model year, and experiences. Check with firms handling the case or visit sites like Top Class Actions for updates.
Will the lawsuit result in a vehicle buyback? It is one possible outcome being sought, though results will depend on the final resolution or settlement.
Does the thicker oil recommended in the recall harm the engine? GM specifies it for recalled vehicles that pass inspection, but some owners worry about long-term effects on performance and efficiency.
How can I check if my vehicle is part of the recall? Enter your VIN on NHTSA.gov or contact your local GM dealer.
Are 2025 models included in the GM L87 lawsuit concerns? Some reports suggest similar risks may exist, though the main recall focused on earlier years. Monitor updates closely.