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
  • MEMBER
  • 1 POST
on cold start truck RPM is good but then drops to the point thst it stalls worst in cold weather
Dec 9, 2012 at 6:42 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
it sounds like the idle control motor is not working. have it tested to confirm.

Roy
Dec 9, 2012 at 7:05 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
Check for vacuum leaks and check the idle air control solenoid (IAC)
Dec 9, 2012 at 7:05 PM
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