Climate System
Blower (fan) motor, A/C compressor, condenser, evaporator, heater system, automatic climate control, refrigerant leakage, electrical failure.
What Owners Say
"The damper controlling the heat and cooling on the drivers side has stopped working."
Anonymous, AR (2004 GMC Sierra 1500 Base 5.3-L V8)"Duel Climate control, Last year the driver side stopped working, got it fixed for over $700. Within six months the passenger side stopped working, took it back and the dealer said it would cost over $800 to fix! They should have told me that there was two separate controls and advised to get them fixed at the same time! I did not have them fix it, and probably won't have it done at all! Which makes it VERY UNCOMFORTABLE on warm/hot days!"
Anonymous, OH (2004 GMC Sierra 1500 SLE 5.3-L V8)"Sometimes the Heat&Cool system will reverse on one side or the other. Can not correct it pushing buttons or turning knobs, but if I pull in a parking lot and turn off the engine a few seconds, and restart it, it will operate normally, usually t"
John-Ruth L., WI (2004 GMC Sierra 1500 SLE 5.3-L V8)"Blend door actuator failures and control panel failure"
Rick S., WA (2004 GMC Sierra 1500 SLT 5.3-L V8)"defective blend door actuator"
W R., TX (2004 GMC Sierra 1500 SLE 4.8-L V8)"The automated climate control unit has failed in regulating heating temps"
Anonymous, WA (2004 GMC Sierra 1500 Base 4.3-L V6)"Sporadic problem in hot weather with AC not kicking on or kicking off during operation. Solution: pull over turn off engine wait 2-3 minutes and then turn engine back on. AC returns to good operation. Happens 3 to 5 times during hot weather. Deale"
Anonymous, TN (2004 GMC Sierra 1500 Denali 5.3-L V8)"There is an intermittent problem with the firmware/software on the air conditioning control, usually fixed by shutting vehicle off and restarting, however not always"
Anonymous, NM (2004 GMC Sierra 1500 SLT 5.3-L V8)"A/C Blend door controls"
Anonymous, TX (2004 GMC Sierra 1500 SLE 4.8-L V8)"The heat will come on high and I have to shut the vehicle off to get it to stop and reset"
Charles G., MI (2004 GMC Sierra 1500 SLT 5.3-L V8)"Will blow cool on one side and hot on the other side. Sometimes both vents will blow hot"
Larry B., FL (2004 GMC Sierra 1500 SLT 5.3-L V8)"Will only work on maximum. Have not had repaired due to possible expense"
Anonymous, MI (2004 GMC Sierra 1500 WT 4.3-L V6)"Blower motor only worked at a lower speed. Had it repaired several times"
Anonymous, VA (2004 GMC Sierra 1500 SL 4.3-L V6)"Doesn't work"
Thomas G., NY (2004 GMC Sierra 1500 SL 5.3-L V8)"The selector for the A/C burned up, wires melted, no A/C at all"
Anonymous, OH (2004 GMC Sierra 1500 SLE 5.3-L V8)"A/C temperature adjustment on driver side erratic"
Anonymous, AL (2004 GMC Sierra 1500 SL 5.3-L V8)"Actuator switch for heat or AC went bad. I could not switch heat or cooling from one to the other. Emergency brake release cable broke Oil pressure gauge failed"
Anonymous, NM (2004 GMC Sierra 1500 Base 5.3-L V8)"Work and then stop during operation"
Mark M., OR (2004 GMC Sierra 1500 SLT 5.3-L V8)"The controls for the seat heating is too close to other controls and is easy to inadvertently actuate"
Anonymous, NM (2004 GMC Sierra 1500 SLT 5.3-L V8)"With AC on, system will start blowing hot air into cab. Stopping, completely shutting off the vehicle, counting to ten (optional), and restarting the vehicle corrects the problem. GM dealers can NEVER find anything wrong . Ho, hum."
Kenneth S., IN (2004 GMC Sierra 1500 WT 4.3-L V6)"The heater will not always turn on and when it does debris comes out of the vents"
Anonymous, WA (2004 GMC Sierra 1500)
"Common problem w/o a permanent solution"
Mark M., OR (2004 GMC Sierra 1500 SLT 5.3-L V8)