Avalanche 1500

Improper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator on Chevrolet Avalanche 1500

Problem Description and Possible Solution

One or more heater & AC (HVAC) air delivery and/or temperature mode door actuator may fail. This can result in incorrect air delivery or temperature. If this occurs, fault code(s) stored in the HVAC control module should be available to assist with diagnoses.

Problem Data
RepairPal Verified
Average mileage: 130,182 (16,200–222,000)
5 model years affected: 2002, 2003, 2004, 2005, more2006
73 people reported this problem
Viewing 1 - 20 of 40 comments
Intermittantly, hot air comes thru driver's side when all selectors are off. This can happen when A/C is on also, but passenger side is cold. No codes come up on computer when checked. Replaced driver's side actuator door once with an after-market product. It's still doing it. Temp fixes include turning off engine and restarting; turn knob to defrost to redirect air; and recently found that pressing the recirc button helps too while driving. Does the driver's actuator door need to be replaced again? Does it need to be a GM part?
Dual zone air delivery - one side blows a/c cooled air and the other blows heated air in spite of temp control settings
when air is on,suddenly it switches to full heat.If i stop and turn the engine off then restart the air works again.
Driver's side emits cool air when heat is selected. Passenger side blows hot air.
After battery removal air will only blow through defrost vents.
Heat is not blowing. Have put in new blower motor, blower resistor and changed the 40 amp fuse which was blown
No heat cold air only.....
I get no air at all heat or ac will not blow.
climate dual control both sides down to cold ac switch is on .blows cold air to passenger hot air on driver.
not fixed yet . looking for repair shop
With air conditioning on, sometimes blows hot on passenger side, cold on driver. Sometimes opposite. Turn off engine, restart sometimes let's air conditioning work again
The problem that I have at times is the air condition is hot on the drivers side vents, but cold on the passenger side vents
Selector for change of air not working. blower motor works fine, temperature works fine. can not change direction from defrost though.
The air blending door " stepped motor" failure
I will be driving and out of no where, I have hot air instead of my cold air on the driver side.
Heater blows cold air to drivers side and hot air to the passenger side when heat is on.
Climate control lights for the passenger no long illuminate, when setting is on cold, cold air will blow on drivers side vents, but heat (that is hotter then the blazes of hell) blows from the passenger vents.
Air will only blow through the defrost vents
The heat is working. The vents will not blow. There is a clicking noise from under passenger side dash from a large black heating unit of some type.
No heat on the drivers side
The error was not circulating properly but after I change the actuator in the sand blower and repair that it worked fine.