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Revs Up
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On cold start truck RPM is good but then drops.
ANONYMOUS
MEMBER
2003 GMC SIERRA
250,000 MILES
On cold start truck RPM is good but then drops to the point thst it stalls worst in cold weather
Monday, December 10th, 2012 AT 2:42 AM
2 Replies
ASEMASTER6371
MECHANIC
52,797 POSTS
It sounds like the idle control motor is not working. Have it tested to confirm.
Roy
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Monday, December 10th, 2012 AT 3:05 AM
JACOBANDNICKOLAS
MECHANIC
109,885 POSTS
Check for vacuum leaks and check the idle air control solenoid (IAC)
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Monday, December 10th, 2012 AT 3:05 AM
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