Found out the fix, at least for me. All is good now
My 2008 GMC Yukon is doing the same thing. It starts out fine and then ends up blowing out of defrost . I can cycle through the modes and get it back to vents but then it just does it again. WHAT did you do to fix this problem? Thanks for any help.
When I turn on a/c, air is coming thru dash vents. After about 30 seconds later the air is diverted to the defroster vents. This has the auto system
2004 GMC Yukon XL 1500 SLE
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Maintenance & Repair
No matter cold or hot, the air only blows through the defroster vents, no matter which setting is selected.
2001 GMC Yukon XL 1500 SLT 4WD
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Maintenance & Repair
A/c is definitely on, I hear the compressor turning on and off.
2003 GMC Yukon XL 1500 4WD
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Maintenance & Repair
2002 GMC Yukon Denali XL heat or AC only blows out of the defroster I have replaced the Actuator and the heater control unit don't know what else it could be
2002 GMC Yukon XL Denali 4WD
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Maintenance & Repair
The car defroster stays on even when the Yukon is turned off or on it stays on how do I get this to stop
GMC Yukon XL
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Maintenance & Repair
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