GPCM Testing

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Feb 19, 2014 | 07:14 PM

#31

F350-6

Post Fiend

Joined: Mar 2007

Posts: 26,966

Likes: 49

From: Texas

The early 99 models and older used a GPR with a shunt. Then they switched over to a GPCM instead and there is no longer a relay there. You either have one or the other.

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