Chevy Trailblazer Blend Door Actuator Reset

The topic of how to perform the actuator recalibration procedure on chevrolet gmc and cadillac trucks and suvs has become an ever increasing topic of discussion.

Chevy trailblazer blend door actuator reset.

A blend door actuator is made up of an electric motor that turns a plastic gear set in one direction or another which is connected to an air control door pivot at the final drive of the unit. Wait for at least 1 minute. On the gmc acadia and the chevrolet traverse the replacement part number for the blend door actuator is 15 73989. Fist thing to do that usually works is perform a reset and calibration of the mode doors and control head.

Parts counter people call this the upper actuator. You may indeed need to replace an actuator. Are read more. An actuator can go bad in of two ways.

Remove the screws from the actuator. Now lay on you back with you head in the drivers floor board. This actuator assembly might fit a few other models but double check the part numbers for your car. Look to left main wire harness needs to be moved to the right up and behind it is th blend actuator 7 32 socket to remove it then manually turn the white peg total labor 30 min.

Pull the actuator from the hvac case. Disconnect the wiring harness from the mode door actuator the mode door actuator has a white gear extending from one side and is the lower of the two actuators. First the electric motor can burn out rendering the unit non responsive so nothing changes when the temperature or. Opening and closing the door can make a difference as the vehicle controls see this as cycle completion.

I just replaced the blend door mode actuator which did fix the problem the direction the vents blow but the driver side vents are still blowing warm air. Re install fuses start truck and do not touch a c control head for 2 minutes. With the key off remove the hvac b and the hcav 1 fuses from the rear fuse block under the second row seats. I have a 2002 chevrolet trailblazer ext.

This grind or click sound is actually the plastic gears stripping inside. Blend door ok first put you front seat down and back raise steering wheel.