A significant legal challenge has emerged for General Motors as a vehicle owner has filed a class action lawsuit against the automotive giant. The lawsuit, filed on February 18 in Michigan federal court, centers on allegations that GM sold vehicles with a dangerous engine defect that causes sudden power loss in models equipped with L87 V8 engines.
Key Takeaways
- Sudden Power Loss Linked to Engine Defect
A class action lawsuit alleges that GM vehicles equipped with the L87 V8 engine suffer from a critical defect in the engine bearings, potentially causing the engine to seize without warning and resulting in complete power loss during operation—posing serious safety risks. - Popular GM Models from 2019–2024 Affected
The lawsuit targets several high-volume vehicles including the Chevrolet Silverado, Tahoe, Suburban, GMC Sierra, Yukon, and Cadillac Escalade—raising concerns for hundreds of thousands of truck and SUV owners nationwide. - Lawsuit Alleges GM Knew and Sold Defective Engines
Filed in Michigan federal court, the lawsuit claims GM was aware of the defect since at least 2022 but continued to sell the affected vehicles, potentially violating consumer protection laws and leading to calls for monetary compensation and mandatory repairs.
The plaintiff, James Powell II, claims that GM knowingly sold vehicles with an engine defect that can cause vehicles to lose power without warning, creating serious safety hazards for drivers and passengers, particularly when traveling at high speeds on highways or in traffic.
The affected vehicles span multiple popular GM brands and models with the L87 V8 engine from 2019 to 2024, including:
- Chevrolet Silverado 1500 (2019-2024)
- Chevrolet Tahoe (2021-2024)
- Chevrolet Suburban (2021-2024)
- GMC Sierra 1500 (2019-2024)
- GMC Yukon (2021-2024)
- GMC Yukon XL (2021-2024)
- Cadillac Escalade (2021-2024)
- Cadillac Escalade ESV (2021-2024)
These vehicles are among the most popular trucks and SUVs in America, with hundreds of thousands of units on the road today. The National Highway Traffic Safety Administration (NHTSA) launched a preliminary investigation into these vehicles in January, adding credibility to the concerns raised in the lawsuit.
Understanding the Technical Issue: Engine Bearing Failure
According to the lawsuit, the defect involves critical engine bearings that can fail unexpectedly. When these bearings fail, they can cause the engine to seize completely or result in a connecting rod breaching the engine block. Either scenario leads to a sudden and complete loss of power while the vehicle is in operation.
For owners of these substantial trucks and SUVs, a sudden power loss presents exceptional dangers. These vehicles are often used for towing heavy loads, carrying multiple passengers, or traveling in challenging conditions. A power loss in such circumstances could lead to catastrophic outcomes, particularly on highways or in adverse weather conditions.
The technical nature of the defect means that regular maintenance may not prevent the issue, and drivers may receive no warning before experiencing complete power loss. This distinguishes the problem from other engine issues that might present warning signs such as unusual noises, check engine lights, or performance changes before complete failure.
GM’s Prior Knowledge: What the Lawsuit Alleges
A central element of Powell’s lawsuit is the claim that General Motors has known about this defect for years but failed to disclose it to consumers. According to evidence presented in the lawsuit, GM has been aware of the engine defect since at least 2022, and possibly earlier.
This timeline suggests that GM continued to sell vehicles with the potentially defective L87 V8 engines despite internal knowledge of the problem. For current owners, this raises serious questions about corporate responsibility and transparency in the automotive industry.
The lawsuit claims violations of the Illinois Consumer Fraud and Deceptive Business Practices Act and similar consumer protection laws in other states. These legal frameworks are designed to protect consumers from exactly this type of corporate behavior – knowingly selling products with undisclosed defects that could impact safety.
Potential Impact on Vehicle Owners
For current owners of the affected models, this lawsuit raises several practical concerns:
- Safety Risks: The most immediate concern is the safety risk posed by potential sudden power loss, particularly during highway driving or when carrying passengers.
- Vehicle Value: The public disclosure of potential defects often impacts resale value, even for vehicles that haven’t experienced the problem.
- Repair Costs: Engine failures related to this defect would likely result in substantial repair costs, potentially thousands of dollars for owners outside of warranty coverage.
- Reliability Concerns: Even for vehicles that haven’t experienced failure, owners now face uncertainty about the reliability of their vehicles for daily use and for longer trips.
The class action status of the lawsuit means that Powell is seeking to represent all consumers who purchased or leased the affected vehicles in Illinois and several other states. This could potentially include thousands of vehicle owners across multiple states.
Legal Demands and Potential Outcomes
The lawsuit seeks several forms of relief for affected vehicle owners:
- A jury trial to determine the facts of the case
- Monetary damages for Powell and all class members
- A court order requiring GM to repair the defect in all affected vehicles
If successful, the lawsuit could result in a settlement or judgment that provides compensation to owners of the affected vehicles and requires GM to address the defect through a formal recall or repair program.
The lawsuit’s timing is particularly notable as it comes after GM announced a separate recall for more than 90,000 Cadillac and Chevrolet vehicles due to a transmission issue that can cause front wheels to lock while driving. This pattern of safety concerns may factor into both the legal proceedings and public perception of GM’s quality control processes.
What This Means in Context of GM’s Recent History
This is not the first time General Motors has faced legal challenges related to vehicle defects. The company has weathered multiple significant recalls and lawsuits over the past decade, including the infamous ignition switch recalls that began in 2014 and ultimately covered millions of vehicles.
For owners of Silverado, Tahoe, Suburban, Sierra 1500, Yukon, and Escalade models, this current lawsuit represents another chapter in GM’s complicated history with quality control and consumer safety. The outcome will be closely watched not only by current owners but also by potential buyers considering these popular American-made trucks and SUVs.
The L87 V8 engine, marketed as part of GM’s “EcoTec3” family, has been a selling point for these vehicles, promising a balance of power and efficiency. If the allegations in the lawsuit prove true, questions will arise about the engineering and testing processes that allowed such a significant defect to reach production vehicles.
Steps Vehicle Owners Should Consider
If you own one of the potentially affected vehicles, several practical steps may help protect your interests:
- Monitor for Symptoms: While the lawsuit suggests the failure occurs without warning, paying close attention to any unusual engine sounds, performance changes, or warning lights is still advisable.
- Document Communication: Keep records of any discussions with dealerships or GM customer service about engine concerns.
- Stay Informed: Follow updates on both the lawsuit and any potential NHTSA investigations or recalls.
- Consider Service Records: Maintain detailed service records to document proper maintenance of your vehicle.
- Consult with Professionals: If you experience engine issues that might relate to the alleged defect, consulting with both qualified mechanics and legal professionals may be appropriate.
The lawsuit is currently in its early stages, and GM has not yet publicly responded to the specific allegations regarding the L87 V8 engine defect. As with most complex class action cases, resolution could take months or years, depending on how vigorously GM contests the claims and whether evidence supports the allegations.
Legal Representation and Case Details
The plaintiff in this case has assembled a team of attorneys from multiple firms, including Coulson P.C., Goldenberg Heller & Antognoli P.C., Byron Carlson Petri & Kalb LLC, and Arias Sanguinetti Wang & Team LLP. This combination of legal expertise suggests a well-resourced approach to challenging one of America’s largest corporations.
The case is formally identified as Powell v. General Motors LLC, Case No. 2:25-cv-10479, and is proceeding in the U.S. District Court for the Eastern District of Michigan, Southern Division.
For those following similar consumer protection cases, this lawsuit joins other recent class actions against major companies, including Blue Shield (regarding patient data sharing), Hertz (concerning a data breach), Fashion Nova (over pricing practices), and Amazon Audible (related to subscription practices).
Technical Aspects of the L87 V8 Engine
The L87 V8 engine is a 6.2-liter power plant that serves as the premium engine option in many of GM’s full-size trucks and SUVs. Part of GM’s “EcoTec3” family, this engine incorporates technologies like direct injection, variable valve timing, and active fuel management to balance power with efficiency.
When functioning properly, the L87 produces approximately 420 horsepower and 460 lb-ft of torque, making it popular for customers who need towing capacity or appreciate responsive acceleration in large vehicles. The engine is paired with GM’s 10-speed automatic transmission in most applications.
The alleged bearing defect would affect critical components within the engine that support the crankshaft and connecting rods. These bearings enable the smooth rotation of these components under extreme pressures and temperatures. When bearings fail, metal-on-metal contact can occur, quickly leading to catastrophic engine damage.
The specific nature of the alleged defect – whether it stems from material quality, design flaws, or manufacturing processes – remains to be determined through the legal process and engineering analysis.
Broader Implications for the Automotive Industry
This lawsuit occurs during a period of significant transition in the automotive industry, with manufacturers navigating the shift toward electrification while maintaining traditional internal combustion offerings. For GM specifically, the company has committed billions to electric vehicle development while continuing to rely on profitable truck and SUV sales powered by conventional engines.
Quality concerns with flagship internal combustion engines could potentially accelerate consumer interest in alternative powertrains, including GM’s own electric offerings.
Conversely, if the allegations are not substantiated, they could be seen as part of a broader pattern of challenges to traditional automakers during this transitional period.
For owners of the affected models, the most immediate concern remains the potential safety implications and how GM will address them, regardless of the broader industry context.
As this case progresses through the legal system, both current owners and potential buyers of GM trucks and SUVs will be watching closely to see how the company responds to these serious allegations about some of its most popular and profitable vehicles.
Managing Editor
Christopher is an automotive technical writer. When he’s not at the local autocross event, he can often be found working on one of his cars. Specializes in automotive class action law, industry trends, and automotive maintenance. Email me direct, or learn more about us
