#27 fuse blowing

Tiny
ERICSCOFIELD
  • MEMBER
  • 2006 GMC SAVANA
  • 150,000 MILES
Blowing #27 crank fuse intermittingly, I replaced starter.
Friday, May 6th, 2022 AT 7:17 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
Fuse #27 powers the PCM. This can be caused by a shorted ignition coil, fuel injector or O2 sensor. I would disconnect all O2 sensors and drive it to see if the fuse blows, how often does this happen? Here are the oxygen sensor locations to help get you started. Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.
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Friday, May 6th, 2022 AT 2:50 PM

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