The air temp actuator for the driver side probably needs to be replaced. mine is doing the same thing on a 2004 gmc sierra.
I think the expansion valve is not working but I dont know whw\ere is at
Usually a sign of a faulty blend door under the dash
SOURCE: The air conditioner is blowing hot air on the driver's side only.
poss ac vent elec valve under dash bad
SOURCE: 2005 GMC Sierra Denali - Installed new battery; driver a/c hot
need to go to dealer to have HVAC module reprogramed. whenever diconnecting battery power on these vehicles you can connect a 9 volt battery between neg and pos to keep the memory in the computers. I am an master ase technician and 5 classes from gm world class tech.
SOURCE: 2005 GMC air conditioning
hello wwwatkin,
i stated my post in the clarification post and you can not rate my solution and since rating is just as important to us as answering your questions, can you please rate me in this post?.
thank you in advance and i really would appreciate it if you rate me a fixya.
again, thank you,
drcool299
SOURCE: 2005 gmc sierra 2500hd heated seat turns off
you have a couple of problems first of all your drivers sd=ide heated heat pad is probably faulty, for your heating problem you may have to get the hvac doors recalibrated.
SOURCE: 2005 GMC Sierra 1500 - heater blows, but only cold air
Check coolant level. Check for heat at the heater hose going from water pump to heater core at firewall. Check to see that cable is moving coolant control valve from the closed to open position. Low mileage so it shouldn't be plugged heater core.
Testimonial: "You were absolutely correct. Low coolant level. Put in some 50/50 and we're nice and toasty now, but need to find out why coolant was so low. Thanks."
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