Question about 2005 GMC Yukon Xl Denali
The ac does blow cold but only on a low setting, the rear a/c system works fine.
Hi there, I believe it could be your switch, you will need to have the switch tested and if faulty then you will have to replace it, hope this helps
Posted on Mar 22, 2014
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Posted on Jan 02, 2017
SOURCE: AIR CONDITIONER
On most vehicles with front and rear A/C, the two systems are basically independant of each other just sharing the compressor and condensor. It is possible that the Mode Door (controls where the air flow is sent; ie: windshield, vents, floor) is out of adjustment or sticking.
Posted on May 21, 2008
The rear air has an expansion valve in the rear of the cargo area right next to the rear evaporator. There is no orifice or filter between the condenser and the rear expansion valve so if there is any debris in the line it will clog the expansion valve. The orifice under the hood is only in the front circuit so if the front is cooling and the rear is not, most likely the expansion valve is clogged and needs to be replaced.
There is a factory service bulletin on how to r&r the expansion valve. It requires some cutting since they did not design it to be replaced. Part of the service bulletin is adding an inline filter at the outlet of the condenser before the front and rear flows divide. That will keep the rear from clogging up again.
I have a 94 Suburban and I had to do this in about 1998. With the filter I haven't had any problems since.
Posted on Sep 10, 2009
SOURCE: have a 1999 GMC Suburban
There is a actuator motor not working .The actuator motor moves the temp door,it is located on the bottom of the blower box,under the dash ,in the middle,it is a flat box,with three screws holding it on,change this out and the problem will be fixed.If this was at all helpful,please rate thank you.
Posted on Aug 16, 2010
Are you aware of any codes that may stored in the body control module and do you hear a clicking or ticking noise in the rear?
Posted on Nov 02, 2010
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