Questions & Answers for: GMC Envoy engine overheat high speed

engine revving high after changing termostat the thermostat does not affect engine speed, please give me more information

...engine until it just starts to overheat, high end of normal zone on gauge, then shut the engine down and run cold water over the radiator core, this will self bleed the system and the coolant will be ...

vibration My Envoy vibrates when standing but turned in the drive speed stepping on the brake pedal, when it is high or red light possible engine misfire. get engine codes checked free at Autozone

engine idle to high. how do i turn it down 2002 envoy the idle is not adjustable on this vehicle, it's computer controlled.. sounds like a large vacume leak. open the hood and listen for a loud ...

my check engine kigh came on my 2002 gmc envoy, its the high speed fan, what should i do, you can alway hear the fa9n The engine fan? Replace the fan clutch.

engine control module) of a high mileage vehicle is replaced and/or reprogrammed without performing the Throttle/Idle Learn procedure, the ECM/PCM may no longer compensate for existing carbon build up

...overheat when outside temp over 90 degrees. Shut A/C off engine temp comes back down.. Mostly in traffic or slow speeds. At high speeds no problem with temp. Check you radiator fan clutch, it is ...

...engine to overheat. another reason to check the radiator is it is overheating in the hot part of the day and not in the morning cool part of the day. also check the water pump bearing for looseness, ...

high fan speed and slow shifting engine roars at take off and have to let up on the gas pedal so that the vehicle can shift sounds like a envoy with a stuck fan clutch

...high speed. If it doesn't work at all I can usually get it going by turning the vehicle on and off several times. Your problem most likely is the resistor block.  In order to limit the ...