2002 Chevrolet Suburban ECM B Fuse

2002 CHEVROLET SUBURBAN
200,000 MILES • 6.0L • V8 • 4WD • AUTOMATIC
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ISAAC TRESSLER
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  • 1 POST
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.
Jul 7, 2015 at 6:21 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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HMAC300
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 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.
Jul 7, 2015 at 6:37 AM
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WRENCHTECH
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 20,761 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
Jul 7, 2015 at 7:02 AM