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PCM 1 fuse problem

Breasbois

New Member
Joined
Aug 17, 2022
Messages
1
I have a 2005 avalanche and it keeps blowing the pcm 1 fuse so I did some research and I changed the fuel pump and the ecm and it ran for about 15 min then died again and won’t do anything now just keeps blowing the fuse. Does anyone have a idea what it could be?
 
Wire bundles can get chaffing & worn through, check visually as many areas as possible. One hot wire short to ground can cause fuse burning out.
There are a few common spots One near alternator underside bundle rubbing a post.
 
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