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2002 Chevrolet Suburban ECM B Fuse

Tiny
ISAAC TRESSLER
  • MEMBER
  • 2002 CHEVROLET SUBURBAN
  • 6.0L
  • V8
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
The ECM B fuse keeps blowing as soon as you turn on the key. I put a 25 or 30 amp fuse and it blows.
Tuesday, July 7th, 2015 AT 6:21 AM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
This fuse powers only the pcm so check for a short on the orange wire leading to pcm or bad connection or pcm. A pro will need to install pcm because of security system. You probably have water intrusion into pcm.
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Tuesday, July 7th, 2015 AT 6:37 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
You might also try unplugging all the injectors and see if it still blows.

When a circuit powers the PCM, it in turn powers everything that the PCM powers
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Tuesday, July 7th, 2015 AT 7:02 AM

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