Is this an automatic climate control system or manual temperature control?
Is this a dual system, meaning... does it have a driver AND passenger side temperature controls?
Your vehicle has more than one actuator. Which actuator are you searching for?
The Heat/Cool (blend actuator). If with dual temperature control are you looking for the driver or passenger side?
The inside/outside air (recirculation actuator).
The Defrost/vent/floor (mode actuator).
Is this an automatic climate control or manual climate control? Meaning, do you set the temperature to a numbered temperature setting or do you simply have hotter or colder?
Are you looking for the passanger side or driver's side actuator?
Excellent. Thank you. There are MANY diagrams and all are different from manual systems, automatic systems, single automatic systems, and dual automatic systems.
GM calls this the left air temperature actuator shown as #1 in the following picture.
Another more detailed view the left air temperature actuator is #5 in the following diagram.
One more view shows the right and left temperature actuator. #1 is right and #2 is left.
You do not have to remove the whole dashboard. You do have to remove the instrument panel carrier. A tight spot, tight place, and cramped but can be done without removing the entire dash.
Tilt the steering wheel to the full down position. Remove the left closeout/insulator panel. Remove the knee bolster trim panel. Remove the screws retaining the bezel to the instrument panel. Remove the bezel from the instrument panel. If equipped, remove the transfer case shift control switch. Remove the rear wiper washer switch. If equipped, remove the cigar lighter or 12-volt power supply outlets. Remove the bezel from the vehicle.
Remove the left closeout insulator panel. Remove the knee bolster trim panel. Remove the instrument panel cluster (IPC) bezel, Chevrolet only. Remove the instrument panel (IP) accessory trim plate, GMC or Oldsmobile only. Remove the screws retaining the IPC to the IP. Partially remove the IPC from the IP in order to gain access to the electrical connector. Disconnect the electrical connector from the IPC. Remove the IPC from the IP.
Recalibrate the actuators by removing the HVAC fuse for 2 minutes. Start the vehicle and turn on the HVAC unit. DO NOT TOUCH the controls for 2 minutes while the actuators are calibrating.
There are 3 mounting screws. You missed one. That third one is really fun to get to.
Here is a picture of the actuator so you know where the mounting screws are.
Attachments are only available to registered users.
The small plastic pin you are looking at is what holds the actuator together not what holds it to the heater box. Get a BRIGHT light and look in there with a small mirror to find the bottom screw. I highlighted the 3 screws in red on the following picture for you. Open the picture and save it to your computer. Then zoom in to get a better look if that kelps. That 3rd screw is in there, I promise you that.