Question about 2004 GMC Sierra

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2005 GMC Sierra Denali - Installed new battery; driver a/c hot

Immediately after I replaced my battery, the drivers side starting blowing extremely hot air, while the passenger side continued blowing cold air.

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Need to go to dealer to have HVAC module reprogramed. whenever diconnecting battery power on these vehicles you can connect a 9 volt battery between neg and pos to keep the memory in the computers. I am an master ase technician and 5 classes from gm world class tech.

Posted on Jul 31, 2010

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1 Answer

Replaced the battery on a GMC Sierra 2005. Turned AC on, it cooled for about a minute and started blowing hot air on the driver side, the passenger side blows cold. What does replacing the battery have to...


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