Question about 2004 GMC Envoy
Did you ever figure out what was wrong with your dash vents? I have the same exact problem.
I got the same problem. I was told it was the AC control module that goes bad and it kills the ability to blow air out the AC dash vents. My Envoy is a piece of junk, electrically speaking.
Posted on Aug 20, 2008
I replaced the battery in my 04 envoy. I lost the rear defrost, air conditioning, air recycle, and the ability to control the vents. I could control the fan fine. I just disconnected the battery for 1/2 hour, hooked it back up and everything worked fine. I guess reseting the computer solved it.
Posted on Dec 28, 2008
This is what you should do, I had the same problem on my 2005 Yukon Denali, and got it checked by an A/C Technician to find that the A/C Module which gives the power to the internal fan to blow the air through the dash vents, stopped working and changing this piece solved my problem...
Hope this helped
Posted on Mar 21, 2009
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