2003 Gmc Sierra On Cold Start Truck Rpm Good Drops Point Thst Stalls Worst

2003 GMC SIERRA
250,000 MILES
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ANONYMOUS
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  • 1 POST
on cold start truck RPM is good but then drops to the point thst it stalls worst in cold weather
Dec 10, 2012 at 2:42 AM
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ASEMASTER6371
  • CAR REPAIR CONTRIBUTOR
  • 52,796 POSTS
it sounds like the idle control motor is not working. have it tested to confirm.

Roy
Dec 10, 2012 at 3:05 AM
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JACOBANDNICKOLAS
  • CAR REPAIR CONTRIBUTOR
  • 110,190 POSTS
Check for vacuum leaks and check the idle air control solenoid (IAC)
Dec 10, 2012 at 3:05 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.