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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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
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
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
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Check for vacuum leaks and check the idle air control solenoid (IAC)
Dec 10, 2012 at 3:05 AM
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