sounds like you need an A/C programmer
The best thing would be to scan the vehicle computer and check out what is going on but if that is not possible then check the passengers side temperature control sensor located to the far right side of the glove box.............
it is in driver mirror
That can happen if they are low on freon.
It is possible for hot air to be coming out of the driver's side and cold on the passenger's side if there is a dual temperature control on the heater/AC unit. Try adjusting the temperature controls to see if that fixes the problem.
Split zone is when the driver and passenger sides have separate temperature controls.
the problem is a part called the air temperature control blend door actuator motor, it is deep inside the dash and the dash must be removed to replace it.
1 Mode 1 Air Inlet 2 Temp 1 passenger 1 driver
heater control valve is bad on the drivers side.
usually you just stick the key in the door and turn the key as if to lock it. try both the driver and passenger doors.
This is often caused by a blocked air conditioner drain. When the air conditioner develops condensation, it has nowhere to go but either the driver's or passenger's side floorboards. In addition, the floor can be rusted out which will cause water intake as well.
Hi Buick, I am having the same problem but have not yet corrected it. Basically, you have a vacuumn system problem though. You can see some information at Buickforums.com There are two air "doors" behind your glove box that blend hot/cool air. they are controlled by a vauumn tube that may be cracked, crimped, or broken.
The Avalanche has dual controls for the air conditioning system. One control operates the driver side ac vents, and the other control operates the passenger side vents.