Will not start after replacing ECM

144,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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TRAVISJ1988
  • MEMBER
  • 1 POST
I just replaced the ECM and now my truck will not start.
Mar 24, 2019 at 5:41 AM
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JOETECHPRO
  • ✓Experienced Mechanic
  • 705 POSTS
Hey TRAVISJ1988,

The new engine control module will need to be programmed to the vehicle before the vehicle will start.

You will need a scanner with a programming/replacement modules function to do this.

This may need to be done at a GMC dealer.

Regards, Joe
Mar 24, 2019 at 10:32 AM
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