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2003 GMC Yukon rough idle at start up.

Tiny
MGOLMES
  • MEMBER
  • 2003 GMC YUKON
  • V8
  • FWD
  • AUTOMATIC
  • 81,000 MILES
When I first start the suv whether cold or warmed up the rpms jump form 300 to 500 for a few minutes. Once the engine is warn no problems. Only when I shut off and restart.
Saturday, September 5th, 2009 AT 8:57 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,707 POSTS
Has the check engine light come on? It sounds like a problem with either the EGR or throttle position sensor; however, without a check engine light, that is a guess. Also, check for vacuum leaks.

Let me know what you find.
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Monday, October 5th, 2009 AT 11:19 AM

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