2003 GMC Sierra Repair Question
Topics covered: Rpm, Stalls, Vacuum leak.
Mileage: 250,000 miles.
Mileage: 250,000 miles.
Asked on December 10, 2012
GMC Sierra Rpm Problem
On cold start truck RPM is good but then drops to the point thst it stalls worst in cold weather
Asked by (pending member)Answer
Replied on December 10, 2012
Check for vacuum leaks and check the idle air control solenoid (IAC)
Replied on December 10, 2012
it sounds like the idle control motor is not working. have it tested to confirm.
Roy
