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Reply To: Engine failure @1,000 miles

#832837
gpglan
Participant

Official cause of failure from GMC. Multiple rod bearing failure due to oil starvation of unknown cause. GM speculation is machining debris left in oil passages or a faulty oil pump. There were no oil pressure warning lights or retrievable codes. In other words no clue what happened. Crank and rods are cooked. All different colors from extreme heat. Tech said all kinds of 6.2 are locking up and failing. Less on 5.3 but still an avalanche of shit and poor workmanship

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