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An alignment issue kept gears from meashing correctly.
To align the unit, the pin in the HVAC gear must sit in the notch in the mode control actuator gear.
One way to correct the alignment issue........
Manually position the vents so that they are open all the way (Turn the HVAC gear, all the way clockwise).
Looking at the front of the actuator unit, side facing outward there are two long marks and two short ones. (Metal insert up).
Position the actuator gear so that notch in the steel section that you can see is between the smaller left and large center mark.
To move the arm
Pull fuse 36, and replaced it.
Then turn the ignition switch on and off until the arm is in the correct place (using the marks).
The lower edge of the actuator arm (gear) will be slightly lower then the molded landing on the HVAC side of the actuator.
Be careful, the arm (gear) will slam into the end points on the new actuator unit and can damage it.
(No camera, No picture)
Install the new actuator
Using your hand manually turn the HVAC gear until the pin fits into the notch in the actuator.
Tighten it up
Pull fuse 36 again and replace it
Turn on the ignition
Let the unit center itself, 90 seconds more or less
Try the controls
Mine worked.
I recommend PLAYING around with the damaged unit being replaced and test fit it to make sure that it works for you.
One opportunity completed on the Envoy another awaits.
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