I read up that this could possibly be caused by a faulty or stuck blend door actuator but i ve read conflicting posts on where this actuator could be located.
2005 silverado driver side blend door actuator location.
The actuator is just on the right side of the hump in the floor.
Sorry to pop in here just to clarify this is the driver side temperature actuator and the easiest out of 4 actuators.
The mode door actuator is on the left and the resirc door actuator is at the top of the dash near the windshield.
2005 chevy silverado passenger side door blend actuator replacement.
A faulty electric door actuator is often the cause of this there is a really good video on youtube showing location and how to replace it.
There is a replacement mode or blend actuator available at most auto parts stores dorman part 604 107 price 39 99.
The recirculation door actuator is sitting a bit higher to the right the mode door actuator is accessible from the driver side and the passenger side temperature actuator my favourite is on top of the heater box and a real.
These units can be either hanging in front of you or in a little more obscure places such as on the side the hvac plenum.
I noticed last night that one i took out of the truck actually has a couple less pins in the harness connector.
There were several different actuators though.
Then locate and identify the actuator to be replaced.
The blend door is in the hvac box located under the dash on the passenger side.
Blend door actuator locations begin by identifying the problem either defrost mid or floor or temperature modes not working.