It is under the dash on top of the HVAC module
There are usually only 1 blend door on a truck. This also goes for a 2005 Chevrolet Sliverado.
The entire dash assembly needs to be removed to gain access to the blend door actuator. Big job, suggest acquiring a shop manual of you plan on doing this job yourself.
Behind The Dash Underneath The Steering Wheel , Slightly To The Right.
where is the defrost/floor door actuator on 2002 chevy trailblazer
Remove the dash assembly to gain access to the blend door actuator.
You will need to remove the dash assembly to gain access to the blend door actuator. Recomend purchasing a shop manual of you intend on doing that job.
The temp blend door actuator is probably at fault.
The blend door actuator on the late model Chevy Tahoe is located behind the dash in the glove box area. Broken blend doors and broken blend door actuators are a very common problem among Chevy Tahoe, Suburban, and Silverado models. Typically, to repair a broken blend door, a mechanic will disassemble the dash and replace the plenum box. It is an expensive and labor intensive repair. There are also some DIY solutions such as the heatertreater that provide hardware and instructions for performing the repair by removing the glove box rather than the entire dash. It is worth looking into if you think you have a broken blend door.
It's a temp blend door and actuator, and it is located behind the dash assembly, connected to the HVAC box. The dash assembly needs to come out to access the blend door actuator.
The heater blend door is not run by vacuum. It is run by an electric actuator.
The temp blend door actuator is broken.