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I have a 2008 GMC Yukon Denali that the front AC goes on and
I have a 2008 GMC Yukon Denali that the front AC goes on and off … read more
Jared D
Jared D
Shop Supervisor
Bachelor's
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I have a 2005 yukon denali. blower motor turns on to 2
i have a 2005 yukon denali. blower motor turns on to 2 seconds went powered on then stop. replace blower resistor with updated one, replace blower. no change. ran a ground straight to battery to elimi… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
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I have a 2001 GMC Yukon XL The HVAC motor only functions on
Hi, I have a 2001 GMC Yukon XL The HVAC motor only functions on the highest setting. I have replaced the control panel/switch and the problem persists. I have seen a few different parts on line, regul… read more
George H.
George H.
Technician
Associate Degree
19,117 satisfied customers
Have a 1998 GMC Envoy. The heater will not shut off. Stays
Have a 1998 GMC Envoy. The heater will not shut off. Stays on high speed.. (Will shut off when you turn vehicle off only) Nothing changes when you try to change settings etc...This one is the Auto cli… read more
Lou P. master tech
Lou P. master tech
Mercedes Benz master tech
Bachelor's Degree
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GMC Yukon XL Denali: , I have a 2003 GMC Yukon XL Denali.
Hello, I have a 2003 GMC Yukon XL Denali. The front blower does not work at all. So far, I've replaced (with all new, no refurb or reman) the front AC control unit (the same unit with automatic air), … read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
GM Yukon XL 1500: 2003 gmc yukon xl 1500. Rear air/heat works
2003 gmc yukon xl 1500. Rear air/heat works only sporadically. I was thinking of replacing the rear blower motor control module/resistor. Any suggestions??… read more
Don Knight
Don Knight
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Associate Degree
1,471 satisfied customers
GMC Savana Van: I have a 1998 gmc savanna van that has rear
I have a 1998 gmc savanna van that has rear and front a/c and the blower motor seems to have stopped. i can turn both front and rear on any speeds and nothing happens and i cant hear anything. What se… read more
JFN1
JFN1
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Vocational, Technical or Trade Scho
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GMC Envoy SLT: I have a 2004 GMC Envoy with electronic controlled
I have a 2004 GMC Envoy with electronic controlled heating and a/c system and has rear air. The rear blower motor will come on sometimes when it wants or unless direct ground is applied to the black w… read more
Tim Mohr
Tim Mohr
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Master's Degree
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GMC Yukon XL: 2008 GMC Yukon XL. The front heat has stopped
2008 GMC Yukon XL. The front heat has stopped working. I checked fuse #70 and it was fine. I then checked part 15-81638 A/C Blower Motor Switch/Resistor. At the red side I had 13 volts, on the purple … read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
GMC Envoy XL: I have a 2004 GMC envoy XL. The front AC will
I have a 2004 GMC envoy XL. The front AC will not blow anything when turned on full blast. The rear AC only blows for about 30 seconds and then cuts off on all settings. Any ideas all… Where to start… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
IM STILL HAVING TROUBLE WITH MY HEATER BLOWER. WHEN HEATER
IM STILL HAVING TROUBLE WITH MY HEATER BLOWER. WHEN HEATER BLOWER IS ON THE BLOWER DOES NOT BLOW AT A EVEN SPEED IT GOES UP AND DOWN. EARLIER IT WOULD NOT WORK SOMETIMES WHEN YOU START IT BUT YOU DRIV… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
gmc yukon: 2005 gmc yukon front defrost fan wont blow when
2005 gmc yukon front defrost fan wont blow when first turned on. after vehicle warms up then usually works. also noticed when vehicle cold.. start car no fan . shut off car wait 1-2 minutes then start… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
GMC Yukon XL 1500 Denali: I have a 2008 GMC Yukon Denali XL
I have a 2008 GMC Yukon Denali XL w/ 6.2L AWD. Recently my Aux (Rear) AC stopped working. All functions of FWD and Rear controls appear to work correctly. Swapped FWD/AUX Blower Control. Both worked f… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,837 satisfied customers
GMC Sierra 1500: I have an issue with my electric fan in my
I have an issue with my electric fan in my 2005 GMC Sierra. A couple of weeks ago I noticed that it would run on high for no reason, even shortly after starting it. Now what ever was causing the issue… read more
Jerry
Jerry
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Vocational, Technical or Trade Scho
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GMC: I have a 03envoy slt that has auto climate control that
I have a 03envoy slt that has auto climate control that is not working properly if at all.most of the time it only blows when I'm driving and then continues to run after shutting off the ignition.… read more
Jerry
Jerry
Service consultant
Vocational, Technical or Trade Scho
13,107 satisfied customers
GMC Yukon: I have a 2003 Yukon and the fan, A/C and heater
I have a 2003 Yukon and the fan, A/C and heater fan control does not work; not operational. I replaced the main reostat control thinking that was the problem, nothing works. What do you think the prob… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
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GMC Yukon Denali: OK i have a 2003 gmc yukon denali and my
OK i have a 2003 gmc yukon denali and my heater blower motor quit working completely a couple days ago... so I changed the blower and still nothing... so I wired my old one directly to the battery and… read more
George H.
George H.
Technician
Associate Degree
19,117 satisfied customers
GMC Yukon XL 1500 SL 4wd: I have an 02 yukon xl 4wd with auto
I have an 02 yukon xl 4wd with auto temp control. The blower will not shut off, and actually will go from low blowing to high blowing back and forth. Shutting engine off, removing key, opening door...… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
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Meet the Experts:

Gm Tech (Cam)

Gm Tech (Cam)

GMC Mechanic

1,837 satisfied customers

GM Grand Master Technician 2007. 14 year experience.

Gary

Gary

ASE Certified Technician

1,589 satisfied customers

GCM master tech over 25 years

Dave Nova

Dave Nova

GMC Technician

929 satisfied customers

ASE Master Certification. GM World Class Certification

Chris (aka-Moose)

Chris (aka-Moose)

GMC Technician

705 satisfied customers

16 years of experience

Ron Z.

Ron Z.

- GMC Tech -

291 satisfied customers

18+yrs experience. State Inspector & GMC Diagnostics/Repair

JFN1

JFN1

ASE Certified Technician

272 satisfied customers

GM Master Technician

Don - Mo Lurch

Don - Mo Lurch

ASE Certified Technician

234 satisfied customers

GM, GMC, Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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