Overview
- The investigation was elevated from a Recall Query to an engineering analysis after thousands of engines failed following GM’s 2025 recall of 597,630 vehicles with the 6.2‑liter L87 V8.
- Government engineers have pointed to possible manufacturing flaws in connecting rods and crankshafts, including rod‑bearing damage from sediment in oil passages and crankshaft dimensions or surface finish outside specifications.
- GM told regulators it received 28,102 field complaints in the U.S. and logged 6,953 reports of engine failure after dealers completed the recall remedies.
- NHTSA has received 499 complaints about post‑remedy failures and 191 reports of failures in models outside the original recall window, and some failures occurred in vehicles that had replacement engines.
- If the engineering analysis finds the fixes failed, regulators could require broader remedies, expanded recalls, or other actions that would raise repair costs, legal exposure for GM, and short‑term disruption for owners who rely on these trucks and SUVs.