Question about 2001 GMC Yukon
To check the rear expansion valve, see if the a/c lines are different temperatures. One line to the rear evaporator should be hot and the other cold if it is working.
Try to recailbrate the blend door actuator. Remove the HVAC module fuse. Wait at least 15 seconds. Replace it, turn the key on and wait 40 seconds
Posted on May 13, 2014
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Posted on Jan 02, 2017
the problem is in the rear expansion valve. this valve is located at the rear evaporator core. i am assuming the freon level has been checked and is ok. this is a common problem with these vehicles. hope this helps!!
Posted on Sep 04, 2009
I have had this problem. I am not a mechanic...so to correct the issue temporarily, I simply turn off the car and restart. This has worked everytime for me. In extreme cases, I think you can also remove the AC fuse and start the car, which will also reset the computer. I also think that by taking the climate control off the "AUTO" setting has worked in the past.
Posted on Oct 27, 2009
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