Question about 2004 GMC Sierra 1500 Crew Cab

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My 2004 gmc sierra. a/c is working fine suddenly starts blowing hot air

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Sounds like you are low on freon

Posted on Sep 28, 2009

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Posted on Jan 02, 2017

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1 Answer

Passenger A/C blowing hot air in a 2004 GMC Sierra SLT.


Usually when one side is hot and the other is cold, and each side is controlled separately, the problem is a blend door not working.
The blend doors are usually controlled by small electric motors.
You might research "blend door" online and see if anything pops up.

Jun 26, 2012 | 2004 GMC Sierra

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Replace the door blend actuator behind glove box, approx $150 for part, Everyone I know with dual control on the silverado's have this problem.

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My a/c work but sometime it blows hot on the left side only it


Probably your left temp actuator failed internally. Check the right instrument panel junction block-right side, end of dash-to make sure connectors are fully seated. But thisis usually caused by a faulty temp actuator.

Oct 03, 2009 | 2004 GMC Sierra 1500 Crew Cab

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Air blend door


Replace the broken actuator.

Apr 15, 2009 | 2004 GMC Sierra

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