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General Motors is recalling more than a million V8 engines used in 2021 – 2024 model year Cadillac Escalade and Escalade ESV, Chevrolet Silverado 1500, Suburban, and Tahoe, and GMC Sierra 1500, Yukon, and Yukon XL vehicles equipped with the 6.2L V8 gas engine (RPO L87). The connecting rod and/or crankshaft engine components in these vehicles may have manufacturing defects that can lead to engine damage and engine failure. This safety defect recall follows years of GM investigating the problem and concluding that no problem existed. However, the National Highway Traffic Safety Administration (NHTSA) continued its investigation based on persistent complaints from users. NHTSA had an active engineering analysis open when GM made the recall decision.

In the required safety defect recall filing – only some of it was made public by NHTSA, GM said “Engine teardown analysis identified two primary root causes, both of which are attributable to supplier manufacturing and quality issues: (1) rod-bearing damage from sediment on connecting rods and crankshaft-oil galleries; and (2) out of specification crankshaft dimensions and surface finish.” The supplier will remain publicly unknown until all the documents are made public, which is likely next Monday in AutoInformed’s experience. Continue reading →