Question about 2002 GMC Envoy
It sounds as if your compressor has locked up. When the compreessor is off the clutch disengages it, when it turns back on the cluch locks up because the compressor is locked up.
Posted on Jul 02, 2009
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Posted on Jan 02, 2017
Clean your Throttle body and pay attention to the Idle Air Control (IAC) valve passageway to try to clean the IAC. A dirty or faulty IAC will cause your engine to stall at idle, the job of the IAC is to open the passage way through the throttle body to regulate the amount of air to enter the engine to keep it from stalling when the Envoy is at idle.
Start with the simple and clean the throttle body and inspect any loose or damaged wire leads to the throttle body. Replace or repair any signs of damage.
Thank you for using Fixya and good luck.
Posted on Apr 13, 2010
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