Another Class Action Filed Over GM L87 Engine – The Trend Is Escalating

General Motors is now facing yet another class action lawsuit over its problematic 6.2 L EcoTec3 L87 V‑8 engines, adding to a growing list of lawsuits that allege failed recall efforts and hidden defects . This latest case—Brian Markus v. GM, filed July 3, 2025, in the Eastern District of Michigan—claims that GM’s recall doesn’t address the core mechanical defects and leaves thousands of vehicles vulnerable to catastrophic failure.

📈 Why the Surge in Class Actions Matters

1. Volume and Velocity
   Since April 2025, at least four major class actions have been filed, including Hernandez v. GM (April), a nationwide suit by Hagens Berman (June), and now Markus (July). The speed and number of new cases illustrate growing consumer distrust in GM's remedy

2. Inadequacy of the Recall
   Plaintiffs repeatedly challenge GM’s repair protocol: inspect for a fault code, then either merely swap to thicker oil or replace the engine with the same, allegedly defective, L87 variant. Critics describe this as a “temporary” and “inadequate” patch that fails to fix the real defect

3. National Scope
   These are nationwide class actions, not isolated cases. Firms like Hagens Berman, DiCello Levitt, Miller Law, and Beasley Allen represent consumers across the U.S., signaling deep, systemic issues with the engine and GM’s response

🛑 What This Means for Affected Owners

• Safety Risks – Sudden engine failure at highway speeds has been widely reported, with no warning signs like noise or dashboard alerts

• Financial Fallout – Plaintiffs not only face repair costs and diminished resale value but also claim GM knowingly sold defective vehicles without full disclosure

• Fuel Concerns – Even for engines that pass inspection, the switch to higher‑viscosity oil may raise fuel consumption—another matter raised in class action complaints

🔧 Why Class Actions Are Gaining Momentum

• Strength in Numbers – Individually overcoming GM’s legal resources is daunting. A class action levels the playing field, pooling claims for greater leverage .

• Visibility Drives Coordination – Early cases (like Powell II and Hernandez) prompted more victims to file, building momentum and prompting new lawsuits like Markus .

• Regulatory Backing – The NHTSA launched an investigation in January into nearly 877,000 vehicles. That official scrutiny fuels legal action and strengthens plaintiffs’ stances

🔍 What You Should Do Next

• Check if Your Vehicle Is Covered – Affected models include 2019–2024 Silverado and Sierra 1500, plus 2021–2024 Yukon, Tahoe, Suburban, and Escalade (regular and ESV)

• Track the Recall – The April 24 recall covers nearly 600,000–877,000 vehicles, with inspection followed by either engine replacement or thicker oil if no fault codes are detected

• Document Everything – Keep detailed records of any engine issues, repairs, dealership correspondence, and notices—whether for class action or potential Lemon Law claims.

🧭 Valero Law's Takeaway

GM’s L87 engine crisis has turned into a growing legal battleground—with each new class action adding weight to the claim that GM’s recall underestimates the safety and financial harm inflicted. For owners, the legal path isn’t just about fixing an engine—it’s about holding GM accountable and ensuring a full remedy, not a bandaid.

If your vehicle is part of the affected group and you’ve experienced issues, we encourage you to connect with a qualified attorney. At Valero Law, we’re committed to helping California drivers evaluate their rights—whether under Lemon Law or by joining a national class action.

The proliferation of class actions—now from multiple, nationally coordinated firms—is a clear signal that the L87 engine issue isn’t going away quietly. More legal filings mean greater scrutiny, stronger claims, and potentially stronger outcomes for affected owners. If you've been affected by this engine, don’t wait—document your case, stay informed, and seek expert advice to protect your rights.