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2004 GMC Yukon Denali XL heater issue

Tiny
SOULI7
  • MEMBER
  • 2004 GMC YUKON
  • 6.0L
  • V8
  • AWD
  • AUTOMATIC
  • 235,000 MILES
The drivers side vents on my 2004 GMC Yukon Denali XL won't change temperature, the air always blows about the same temperature. Passenger side works fine, as does the rear. I have seperate driver and passenger zone heating, using the dials to adjust the digitally displayed temperature.
Any ideas? I assume it's a blend door, but not sure which one. Also the part number would be great too.
Thanks,
Souli
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Wednesday, August 26th, 2015 AT 10:50 AM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
There is a blend actuator for each side, try pulling hvac jfuse inside car with key on for 60 seconds they may reset.
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Wednesday, August 26th, 2015 AT 12:09 PM
Tiny
SOULI7
  • MEMBER
  • 2 POSTS
I'll give it a try tonight. Just to make sure. Pull fuse(s), turn ignition key to on position (but not to point that car turns over), wait 60 seconds, turn key off, and reinsert fuses?
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Wednesday, August 26th, 2015 AT 1:08 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Ya you can start the car if you want and you don'tneed to shut it off when you reinsert the fuse.
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Wednesday, August 26th, 2015 AT 3:14 PM

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