Question about 2008 GMC Acadia
Posted by Anonymous on
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Posted on Jan 02, 2017
Hi, you would need a test light or voltmeter to check the cable. Back-probe (stick your probes in the back of the connector) the terminals 5 and 6 (brown and white wires) with your test light/voltmeter. Turn the key on and change the temperature setting. A voltage should show. See diagram below and let me know if you have any questions.
Posted on Jan 09, 2011
you cannot repair the actuator you need to replace it with new one. These motors turn but get weak with time. if you test it, it works, put it in and it doesn't. this is because the motor is weak, unfortunately GM does not sell these motors separately.
Posted on Aug 23, 2009
Not sure why previous poster showed you how to fix a switch in the door, but anyways.....
I had same problem as you.
My Yukon has the single overhead door, not the "barn-doors", hopefully yours is the same. Open rear cargo door. Using a trim tool (buy the set from Harbor Frieght for less than $10) remove the lower trim (at carpet), upper trim (at headliner), then the right pillar trim (mine has small Bose speaker in it). Loosen trim between passenger side back door and the cargo area main right rear trim. Remove main cargo area right main panel, by unscrewing the big black know, prying out the small plastic plug, and carefully disconnecting the AUX power plug (looks like a cig lighter outlet) once you can get behind the panel a little bit.
Now you are looking at the entire rear system. There are 2 of these actuators. The front one controls airflow going either to floor or ceiling vents, the rear one (towards middle of entire unit) controls AC vs heat percentage flowing through the ducts. Unplug the connector, and 3 screws to remove it.
Install is the reverse.
Posted on Mar 14, 2010
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