2005 GMC Envoy Check Engine Light

2005 GMC ENVOY
79,900 MILES • 6 CYL • 2WD • AUTOMATIC
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SUZIQ2750
  • MEMBER
  • 1 POST
Auto zone connected their tool to it and it shows secondary injection malfunction

there are no changes in the way the vehicle drives or operates.

no weird sounds either

please help

they turn the light off and it comes back on the next day with in 4-5 minutes of the same time it came on the day before
Dec 27, 2007 at 2:02 PM
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BLACKOP555
  • ✓Experienced Mechanic
  • 10,386 POSTS
check your vaccum lines coming off of the air pump you may have a vaccum leak.
Dec 27, 2007 at 2:19 PM
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