Defrost Door Actuator Replacement
Apologies to the site Mods if this post is in the wrong thread.
2006 Armada LE w/ auto A/C controls, adjustable pedals, and Bose stereo
Defroster Door Motor making noise
Symptoms are clicking/ratcheting noise from drivers side dash near gas pedal area when changing from defrost to floor vents or after key off.
There is a mode actuator located just below the defroster actuator, be certain which one is defective by changing from defrost to floor vents and observing where the noise is coming from. The defrost door actuator is located up higher in the dash and is the one which normally goes out.
Part # for the defrost door actuator is 27743-ZP00A about $40.00
Just some general tips
The accelerator pedal must be be moved out of the way in order to remove the stereo amp, it is not necessary to unplug any of its connectors, just remove the cable which runs over to the brake pedal, then unbolt the pedal and move it to the side.
The stereo amp (located behind the body control module) has 2 connectors, the black one is easy to remove, the white one has the release tab located on the firewall side and is hard to get to. I unbolted the amp, disconnected the black connector then manipulated the amp and turned it around to access the white connector.
The new actuator splines may not line up, just insert a wide flat bladed knife or screwdriver and turn the defroster door mechanism to match as close as possible the posistion of the new actuator splines. As you are installing the new actuator turn it back and forth as needed to line it up.
Good luck and feel good about saving a ton of money by doing it yourself