2002 GMC Sierra idle

2002 GMC SIERRA
107,000 MILES • V8 • 4WD • AUTOMATIC
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my 2002 sierra will not idle properly when it is cold. I have replace all of the sensors. It also willl not throw a code so that I can diagnose. Any ideas
Sep 27, 2010 at 7:52 PM
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.
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