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Re: 99 4L80E P0748 PCS no power from PCM
Posted to Transmission Forum on 10/30/2009 2 Replies

Funny update! rechecked many things today, a few days ago, we did repair a red/black (PCS is R/B from PCM to purple in trans.) wire in the main harness as it passed over the engine along with a black wire (rubbed on the hose clamp for the air intake) this was ... Login to read more.

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