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
    2,700
  • #2
    David Boccabello
    Reputation
    880
  • #3
    Drpsychmom
    Reputation
    690
View All

Related Models For Sale

Used Chevrolet Tahoe
3 Great Deals out of 687 listings starting at $4,995
Used Cadillac Escalade
4 Great Deals out of 411 listings starting at $4,500
Used GMC Yukon XL
10 Great Deals out of 554 listings starting at $2,800
Used Chevrolet Suburban
4 Great Deals out of 376 listings starting at $5,871
Used GMC Sierra 1500
254 Great Deals out of 10,805 listings starting at $2,995
Used GMC Acadia
38 Great Deals out of 1,850 listings starting at $4,490
Used Ford Expedition
14 Great Deals out of 343 listings starting at $2,900
Used Chevrolet Silverado 1500
183 Great Deals out of 11,018 listings starting at $1,288
Used Ford F-150
459 Great Deals out of 10,025 listings starting at $1,400
Used Ford Explorer
46 Great Deals out of 1,436 listings starting at $2,800
Used Jeep Grand Cherokee
101 Great Deals out of 2,740 listings starting at $1,695
Used Toyota 4Runner
7 Great Deals out of 436 listings starting at $5,990
Used Dodge Durango
85 Great Deals out of 1,036 listings starting at $2,998
Used Nissan Armada
4 Great Deals out of 145 listings starting at $4,999
Used Toyota Sequoia
9 Great Deals out of 94 listings starting at $4,500

Used Cars For Sale

2018 GMC Yukon SLE 4WD For Sale
7 listings starting at $60,825
2017 GMC Yukon SLE 4WD For Sale
48 listings starting at $49,588
2016 GMC Yukon SLE 4WD For Sale
5 listings starting at $44,240
2015 GMC Yukon SLE 4WD For Sale
5 listings starting at $39,875
2014 GMC Yukon SLE 4WD For Sale
12 listings starting at $27,988

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.