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GM 3800, code 12 while the engine is running.
Posted to Technical Discussion Forum on 2/20/2001 2 Replies

Replaced a PCM the other day on a 92 Pontiac Bonnevile 3800 VIN L, due to several drivability problems and setting false codes. One unusual thing I notice about the defect PCM is that when you ground the ALDL connector when the engine is running, the PCM will ... Login to read more.

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