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Chevy/GMC Duramax 04.5-05 LLY Discussion of Chevy and GMC Trucks with LLY Duramax Turbo Diesel Engines

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Some days i get in and the ac works fine other days one side blows hot while the other blows cold and it switches sides... JOIN NOW TO REMOVE TRACER

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  #1  
Old 07-18-2013, 03:18 PM
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Default my ac blows hot atlernating from driver to passenger side

Some days i get in and the ac works fine other days one side blows hot while the other blows cold and it switches sides
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  #2  
Old 07-20-2013, 03:12 AM
Diesel Wrench

   

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LLY: Ac blowing hot [Archive] - Duramax Diesels Forum

or

"It needs to recalibrate. Turn the ignition on. Wait about 20 seconds. Turn off the HVAC. Turn off the ignition. Wait 30 seconds. Start the truck. Wait antoher 15 seconds. Turn on the HVAC. It will recalibrate and be working within a minute!"

see if that does it for you

2004LB7's Sig:2008 LMM Duramax 3500HD Dually
EFI Live, DPF fell off
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  #3  
Old 07-20-2013, 02:09 PM
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That works for a short while then it goes back to blowing hot
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