Question about GMC Envoy
...heater control, or the vacuum line developed a leak somewhere between an actuator and the heater control or the engine. You can try to pin down by checking airflow out of the defroster, ac and heater ...
heater will not switch from the defrost to the floor on a 2004 envoy MODE ACTUATOR sounds like a vacuum leak from the engine to the heater controls. Can you hear a ssssss noise while the engine is ...
defrost/fan during the start up/idle. Sounds like a vacuum problem. Do you have a seemingly hard brake pedal? If you do chances are your brake booster is leaking vacuum. If not check your vacuum lines
Question about GMC Envoy
...heater to defrost dash/dash vent,,,,when i do that my oil pressure drops ''check gage'' lights on and the car stalls and die unless i switch the heater to floor/face vents Some cars incorporate a ...
...Heater and all the vents switch from floor to front to defrost as expected. The driver and passenger side temperature control knobs work normal also. It is just that the blower runs irratically, at ...
...defrost will not operate There are few things that has to be checked. Check Engine Coolant Level Inspect Heater Control Valve Check Vacuum Feed Blower motor If the blower motor is faulty it will ...
...heater only blows out the defrost and stays on hot, it won't let me regulate the temp or where the air comes out. please help. and my auto start will not work now either. Hi, please try a ...
heater blower not working on 2005 Envoy I have no blowing going on! Its not a fuse and ther is power to it because when i switch from heat to defrost to vent etc. you can hear the vents changing ...
...heater on. Also, the air conditioner will not blow out the dash vents but blows out the floor and defrost just fine. Autozone says i have a secondary air intake problem. Don't know what you mean by ...
heater works fine....but when i switch control to defrost....only cold air blows out defrost vents....any help would be appreciated. the heater & defroster baffles are controlled by electic motors
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