Multiple lawsuits against General Motors over alleged defects in the L87 6.2L V8 engine have been consolidated into a single class action. The claims focus on excessive oil consumption, premature engine wear, and potential safety risks, affecting thousands of vehicle owners.
If you own a late-model GM truck or SUV with the 6.2L L87 V8 engine, you may have noticed something unsettling: your oil dipstick is dropping faster than expected. You’re not alone. Across the U.S., hundreds of drivers have reported excessive oil consumption, mysterious engine noises, and in some cases, complete engine failure—all tied to the GM L87 engine. Now, these individual complaints have escalated into a major legal battle, with multiple lawsuits consolidated into a single class action against General Motors.
This isn’t just about a few unhappy customers. The L87 engine powers some of GM’s most popular and expensive vehicles, including the Chevrolet Tahoe, GMC Yukon, and Cadillac Escalade. These are family haulers, luxury cruisers, and work trucks—vehicles people rely on daily. When an engine starts consuming oil like it’s going out of style, it raises serious concerns about safety, reliability, and long-term value. The consolidation of these lawsuits signals that courts recognize a pattern, not just isolated incidents.
Key Takeaways
- Class action consolidation: Dozens of individual lawsuits over the GM L87 engine have been combined into one federal case to streamline legal proceedings.
- Alleged oil consumption issues: Owners report abnormally high oil usage, sometimes requiring a quart every 500–1,000 miles, far exceeding normal expectations.
- Engine failure concerns: Some vehicles experienced catastrophic engine damage linked to oil starvation or internal component wear.
- Vehicles affected: The L87 engine is used in popular GM trucks and SUVs, including the Chevrolet Tahoe, GMC Yukon, and Cadillac Escalade (2021–2023 models).
- GM’s response: General Motors has issued technical service bulletins but denies widespread defects, attributing issues to maintenance or driving habits.
- What owners can do: Affected drivers should document oil levels, service records, and any engine warnings—key evidence if joining the lawsuit.
- Potential outcomes: If successful, the class action could lead to engine repairs, buybacks, or compensation for affected owners.
📑 Table of Contents
What Is the GM L87 Engine?
The L87 is a 6.2-liter naturally aspirated V8 engine produced by General Motors. It’s part of GM’s EcoTec3 engine family and is designed to deliver strong performance with improved fuel efficiency compared to older V8s. Introduced in 2021, the L87 replaced the L86 in many full-size SUVs and trucks. It features direct fuel injection, variable valve timing, and cylinder deactivation (Active Fuel Management) to save gas when power isn’t needed.
On paper, it’s a modern powerhouse: 420 horsepower and 460 lb-ft of torque in most applications. It’s used in high-end trims where drivers expect both performance and refinement. But behind the impressive specs, a growing number of owners are reporting real-world problems that don’t show up in brochures or test drives.
Common Symptoms Reported by Owners
Drivers have described a range of issues, but the most frequent complaint is excessive oil consumption. Many report needing to add a quart of oil every 500 to 1,000 miles—far beyond the typical 1,000-mile interval GM suggests for top-offs. Some owners only discover the problem when they check their dipstick during routine maintenance or after seeing a low-oil warning light.
Other symptoms include:
- Engine knocking or ticking noises, especially at startup
- Reduced engine power or hesitation during acceleration
- Check engine light with codes related to oil pressure or misfires
- Milky or frothy oil on the dipstick, indicating possible coolant contamination
These signs often point to internal engine wear or design flaws that allow oil to burn off or leak past piston rings and valve guides.
Why Are Lawsuits Being Filed?
The core of the legal action revolves around allegations that GM knew—or should have known—about defects in the L87 engine that lead to premature wear and oil consumption. Plaintiffs argue that the engine’s design, particularly its piston ring configuration and oil control systems, fails to retain oil properly under normal driving conditions.
One major concern is the interaction between the L87’s Active Fuel Management (AFM) system and oil circulation. AFM deactivates half the cylinders during light load to save fuel, but this can lead to uneven cylinder temperatures and increased stress on piston rings. Over time, this may cause rings to lose tension, allowing oil to seep into the combustion chamber and burn off.
Another theory points to inadequate oil pan capacity or poor oil drain-back design, which could leave critical components starved of lubrication during startup. Some owners have reported milky engine oil, a sign that coolant may be mixing with oil—potentially due to a failing head gasket or cracked engine block, both serious and costly issues.
Real-World Example: A Tahoe Owner’s Story
Take the case of a 2022 Chevrolet Tahoe owner in Texas. After just 18,000 miles, he noticed his oil level dropping rapidly. He started carrying extra quarts in the trunk and topping off every two weeks. When he took it to the dealer, they performed an oil consumption test and claimed it was “within normal limits”—even though he was losing over a quart every 800 miles. Frustrated, he joined an online forum and found dozens of similar stories. That’s when he learned about the growing legal movement.
How the Lawsuits Were Consolidated
Initially, individual owners filed separate lawsuits in various state and federal courts. These cases made similar claims: breach of warranty, fraud, and violation of consumer protection laws. To avoid conflicting rulings and reduce legal costs, a judicial panel transferred all related cases to a single federal court under multidistrict litigation (MDL) procedures.
This consolidation allows one judge to oversee pretrial motions, discovery, and settlement discussions. It doesn’t mean the cases are merged into one verdict—each plaintiff still has their own claim—but it streamlines the process and strengthens the collective voice of affected owners.
The MDL is currently active in the U.S. District Court for the Eastern District of Michigan, a common venue for automotive litigation involving GM. Attorneys estimate that hundreds, possibly thousands, of owners may eventually join the class.
What This Means for Vehicle Owners
If you own a vehicle with an L87 engine and are experiencing oil consumption or engine problems, you may be eligible to join the class action. You don’t need to file a separate lawsuit—attorneys are actively seeking participants. However, it’s crucial to keep detailed records:
- Oil level checks (date, mileage, amount added)
- Service receipts and dealer communications
- Photos of dipstick readings or warning lights
- Any engine repair invoices
These documents can help prove your case and potentially increase compensation if a settlement is reached.
GM’s Response and Technical Service Bulletins
General Motors has not issued a formal recall for the L87 engine, but it has released several Technical Service Bulletins (TSBs) addressing oil consumption. These are not recalls—they don’t require dealers to fix the problem—but they do acknowledge that some vehicles may consume more oil than expected.
One TSB recommends using a specific oil viscosity (5W-30 dexos1 Gen 2) and performing oil consumption tests under controlled conditions. Another suggests inspecting piston rings and valve stem seals if consumption exceeds one quart per 2,000 miles.
Critics argue these measures are insufficient. They say GM is downplaying the issue by blaming driver behavior or infrequent oil checks. Meanwhile, owners feel trapped—paying for constant top-offs or facing thousands in repair costs for an engine still under warranty.
Comparison to Past GM Engine Issues
This isn’t the first time GM has faced legal action over engine problems. The company previously dealt with class actions over the 5.7L Vortec engine and the 6.2L L9H engine, both of which had oil consumption and lifter failure issues. In those cases, GM eventually extended warranties and offered buybacks. Many legal experts believe the L87 case could follow a similar path.
What’s Next for the Class Action?
The consolidated lawsuit is still in the early stages. Discovery is underway, meaning both sides are exchanging documents, deposing witnesses, and gathering technical data. Expert engineers are analyzing engine components to determine if design flaws exist.
If the court certifies the class—meaning it agrees the case represents a broad group of similarly affected owners—the lawsuit could move toward settlement negotiations or trial. A successful outcome might include:
- Free engine repairs or replacements
- Reimbursement for oil purchases and towing
- Extended powertrain warranties
- Cash compensation for diminished vehicle value
Even if you haven’t experienced major problems yet, joining the class action now could protect your rights if issues arise later.
How to Stay Informed
Owners should monitor official court filings and register with law firms handling the case. Many are offering free consultations and updates via email. Additionally, staying active in owner forums and Facebook groups can provide early warnings about new symptoms or GM responses.
Conclusion
The consolidation of GM L87 engine lawsuits marks a turning point for affected vehicle owners. What began as scattered complaints has evolved into a coordinated legal effort that could force GM to address long-standing concerns about oil consumption and engine durability. While the outcome is still uncertain, the case highlights the importance of consumer advocacy in holding manufacturers accountable.
If you drive a 2021–2023 GM SUV or truck with the 6.2L V8, now is the time to pay attention. Check your oil regularly, document any issues, and consider joining the class action. Your vehicle’s reliability—and your peace of mind—may depend on it.
Frequently Asked Questions
What vehicles have the GM L87 engine?
The L87 6.2L V8 engine is used in several GM full-size SUVs and trucks, including the 2021–2023 Chevrolet Tahoe, Suburban, GMC Yukon, Yukon XL, and Cadillac Escalade. It’s typically found in higher trim levels and performance packages.
How much oil consumption is considered normal?
GM states that consuming up to one quart of oil every 2,000 miles may be normal. However, many L87 owners report losing a quart every 500–1,000 miles, which experts consider excessive and potentially indicative of a defect.
Can I still drive my vehicle if it’s consuming oil?
You can drive short distances with low oil, but prolonged operation with insufficient oil can cause severe engine damage. Always check your oil level regularly and top off as needed. If consumption is high, have the engine inspected immediately.
Will GM fix my L87 engine for free?
GM has not issued a recall, but dealers may perform repairs under warranty if a defect is confirmed. Joining the class action may increase your chances of receiving compensation or a free repair if a settlement is reached.
How do I join the GM L87 class action lawsuit?
You can contact law firms handling the case or register through their websites. No upfront fees are required, and participation is free. Providing documentation of oil consumption and service history strengthens your claim.
Is the L87 engine related to other GM engine problems?
Yes, the L87 shares design elements with earlier GM V8 engines that faced oil consumption and lifter issues, such as the 5.7L Vortec and 6.2L L9H. This has led some experts to suspect similar underlying flaws in the L87.