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2004 GMC Envoy Check engine light won't go off and stay off

Tiny
LSOLIVETO
  • MEMBER
  • 2004 GMC ENVOY
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 12,600 MILES
How to reprogram the the computor after there was extensive work done in replacing numerous sensors.
Is there a way to fix the computor or must I replace the whole unit.
Saturday, July 10th, 2010 AT 1:13 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
First make sure the battery cables are clean and the battery is in good shape. If it's not it will cause problems. Then get a scanner and see if you can clear the codes. Each time a sensor is replaced the code has to be cleared with a scanner.
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Sunday, July 11th, 2010 AT 3:33 PM

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