5 Known GM L87 6.2L Engine Problems in 2019–2024 Models

The L87 6.2-liter V8 is the top-tier gasoline engine option in GM’s full-size truck and SUV platform from 2019 to 2024. It powers the Chevrolet Silverado 1500, Chevrolet Tahoe, Chevrolet Suburban, GMC Sierra 1500, GMC Yukon, GMC Yukon XL, Cadillac Escalade, and Cadillac Escalade ESV. Roughly 600,000 units fall under the 2024 NHTSA recall alone, but the underlying defect patterns affect a larger population of vehicles produced across the same generation.

On April 26, 2024, General Motors filed NHTSA recall 24V-323 covering approximately 597,000 vehicles equipped with the 6.2L L87 engine. The recall addresses connecting rod and crankshaft bearings that can fail due to manufacturing debris, leading to engine knock, loss of power, and complete engine seizure. GM’s remedy is a multi-step inspection and, where defects are confirmed, full engine replacement at no cost to the owner.

California’s Song-Beverly Consumer Warranty Act creates a presumption that your vehicle qualifies as a lemon after two repair attempts for a defect that creates a substantial risk of death or serious injury (such as a sudden engine failure), four attempts for a non-safety defect that substantially impairs use or value, or thirty or more cumulative days out of service for warranty repairs within the first 18 months or 18,000 miles. The standard is whether GM has had a reasonable opportunity to repair the defect — not a magic number.

Yes. A sudden engine seizure on the highway can cause loss of power steering, loss of brake assist, and stalling in traffic. NHTSA categorizes the L87 connecting rod bearing failure as a safety defect, which is why the agency required a recall. For California lemon law purposes, that classification matters: safety defects trigger the lower two-attempt presumption rather than the four-attempt threshold for non-safety issues.

Yes. A recall does not preempt or replace your lemon law rights. In fact, if the recall repair fails to fix the defect — or if your vehicle suffers additional failures after the recall service — those repair attempts count toward the lemon law threshold. Many GM owners pursue both the free recall remedy and a separate lemon law claim because the recall fix only restores the vehicle to operational condition; it does not compensate the owner for diminished value, lost use, or repeated time in the shop.

This is one of the strongest fact patterns under California lemon law. When a manufacturer issues a recall, applies the fix, and the same defect recurs, the recall repair counts as a failed attempt. If GM cannot resolve the issue after a reasonable number of additional attempts, the owner is entitled to a buyback, replacement, or cash settlement. Document every visit, save every repair order, and keep records of any roadside events tied to the engine.

Excessive oil consumption qualifies if it substantially impairs the use, value, or safety of the vehicle and the dealer cannot resolve it after a reasonable number of attempts. GM has issued multiple Technical Service Bulletins acknowledging oil consumption in L87 and related engines. If your vehicle is consuming a quart or more between oil change intervals — or if the dealer’s repeated repair attempts have failed — the issue meets the threshold for a lemon law claim under Song-Beverly.

Available remedies include a full repurchase at the original purchase price (minus a statutory mileage offset based on miles driven before the first failed repair), a replacement vehicle of comparable value, or a cash settlement that compensates for diminished value and ongoing inconvenience. California’s Song-Beverly Act also authorizes a civil penalty of up to two times actual damages when the manufacturer willfully fails to honor its warranty. Manufacturer-paid attorney fees mean qualified claims cost the owner nothing out of pocket.