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Re: 09 silverado 4.3 PNP B/U switch?
Posted to Technical Discussion Forum on 1/2/2025 2 Replies

I would hook up a capable scantool and look for reported gear positions in the PCM. Retest when the problem is present.

If you just want to find the P/N switch, look for an IMS.

[8L90E IMS] Login to read more.

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