It revs up and down and stalls but it with stop having problems when you turn the heater off
SOURCE: 2003 GMC Envoy stalling w/ AC on when stopping
try turning up the idle ajustment screw also have alternator checked, another solution would be to have your car tuned up weak spark from your coil worn plugs wires etc. not enough power is being produced
SOURCE: Engine stalls when stopping.
has it been tuned up lately?????? if so then adjust the idle speed screw at the carburetor....
SOURCE: 2006 Envoy stalling when idels and won't stay running
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.
SOURCE: 1993 gmc sierra 5.7: stalls on low idle
basic tune up... plugs, wires, cap, rotor theres a start
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