Question about 2005 GMC Sierra

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I have Gmc Sierra 2005 and I disconnected battery and now the a/c is blowing hot. It stars out cool but goes hot. Today when I started it the driver's side is cool but passenger side is hot now. This is crazy!!! Help me if you can Thanks Rusty

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Had the same problem. It's the memory that's reversed. If you turn the heater on it will blow cold. Problem resolves itself after you crank the engine, turn off the ignition for a few seconds and then recrank.

Posted on Jan 20, 2011

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Posted on Jan 02, 2017

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