Question about 1999 GMC Yukon

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Rear a/c I have a 1999 GMC Yukon and my problem is that the rear a/c does not turn on at all can you help me

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Rear fan motor could be out. Check voltage at the REAR switch when its use is enabled by the front switch.

Posted on Jan 07, 2009

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Does the A/C work okay fromn the front? IF so make sure the front control is set to allow the rear controls to be in charge. If not happening I would check the front panel switch and make sure it is allowing the voltage back to rear controls when in on "rear" position. If A/C does not work at all from front or rear, then you may not have enough charge to allow the system to cycle. System should have 2 lbs 12 ozs (44 oz) of R134a installed.

Posted on Jul 15, 2008

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