I have a 2006 GMC Yukon XL with a dual zone ac/havc unit. The rear heat works but the front only blows cold air. I have checked all relevant fuses, checked the climate control module, and all are good

Asked by Jan 21, 2017 at 12:11 PM about the 2006 GMC Yukon SLE 4WD

Question type: Maintenance & Repair

The heater core is good, I believe, since the rear is producing heat. Could I
have a bad actuator? And if so, how can I diagnose that?

1 Answer

I finally figured it out on my own. Apparently there are two separate heater cores, a front and a rear. This I did not know until this morning when I went to flush the core. The front core was plugged with residue and the rear was eventually getting to the same point. I flushed both cores and I am producing good heat both front and rear.

Your Answer

GMC Yukon Experts

  • #1
    clayduster71
    Reputation
    2,770
  • #2
    David Boccabello
    Reputation
    900
  • #3
    Drpsychmom
    Reputation
    740
View All

Related Models For Sale

Used Chevrolet Tahoe
785 Great Deals out of 41,561 listings starting at $1,987
Used Cadillac Escalade
253 Great Deals out of 11,885 listings starting at $1,200
Used GMC Yukon XL
275 Great Deals out of 14,501 listings starting at $2,495
Used Chevrolet Suburban
474 Great Deals out of 23,982 listings starting at $1,799
Used GMC Sierra 1500
1,148 Great Deals out of 64,234 listings starting at $999
Used GMC Acadia
999 Great Deals out of 51,439 listings starting at $1,900
Used Ford Expedition
348 Great Deals out of 17,147 listings starting at $1,500
Used Cadillac Escalade ESV
119 Great Deals out of 5,762 listings starting at $4,500
Used Chevrolet Silverado 1500
2,573 Great Deals out of 173,276 listings starting at $1,000
Used Ford F-150
3,135 Great Deals out of 219,096 listings starting at $1,200
Used Jeep Grand Cherokee
1,024 Great Deals out of 71,591 listings starting at $1,195
Used Ford Explorer
1,186 Great Deals out of 68,925 listings starting at $750
Used Toyota 4Runner
344 Great Deals out of 26,026 listings starting at $1,800
Used Dodge Durango
329 Great Deals out of 24,061 listings starting at $1,500
Used Land Rover Range Rover Sport
84 Great Deals out of 4,726 listings starting at $7,300

Used Cars For Sale

2018 GMC Yukon SLE 4WD For Sale
449 listings starting at $45,275
2017 GMC Yukon SLE 4WD For Sale
229 listings starting at $40,690
2016 GMC Yukon SLE 4WD For Sale
47 listings starting at $35,000
2015 GMC Yukon SLE 4WD For Sale
11 Great Deals out of 229 listings starting at $29,900
2014 GMC Yukon SLE 4WD For Sale
11 listings starting at $19,990

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.