2004 GMC Yukon Denali XL heater issue

2004 GMC YUKON
235,000 MILES • 6.0L • V8 • AWD • AUTOMATIC
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SOULI7
  • MEMBER
  • 2 POSTS
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
Aug 26, 2015 at 3:50 AM
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HMAC300
  • ✓Experienced 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.
Aug 26, 2015 at 5:09 AM
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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?
Aug 26, 2015 at 6:08 AM
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HMAC300
  • ✓Experienced 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.
Aug 26, 2015 at 8:14 AM
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