GMC

GMC troubleshooting questions? Ask a mechanic for answers

Connect one-on-one with {0} who will answer your question

Related GMC Questions
Loss of contol of AC front vents, no AC flow upper, lower,
Loss of contol of AC front vents, no AC flow upper, lower, recirc, etc. Suggests loss of vacuum or bad regulators. … read more
Roy
Roy
shop foreman
Associate Degree
5,396 satisfied customers
I have a 2006 GMC YUKON DENALI XL and the front A/C & Heat
I have a 2006 GMC YUKON DENALI XL and the front A/C & Heat isn't working, I just replaced the front / forward digital control and nothing the blower would occasional spin but never on command and now … read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
1999 gmc safari ac was running on max the heater temp
1999 gmc safari ac was running on max the heater temp control was selected to full hot by mistake . now fan runs but no flow to the vents ac or heat any suggestions of what might be wrong… read more
JFN1
JFN1
ASE Certified Technician
Vocational, Technical or Trade Scho
272 satisfied customers
GMC Acadia SLE: Have 2011 gmc acadia, when i turn ac or heat
Have 2011 gmc acadia, when i turn ac or heat on, i get VERY weak flow of air, almost feels like not blowing out, but i can feel by putting hand near vent either cold or warm air. I checked cabin air f… read more
sprinkles08
sprinkles08
Technician
High School or GED
19,202 satisfied customers
GMC Safari AWD: Hey Mark,I have a 2002 GMC safari van...I have
Hey Mark,I have a 2002 GMC safari van...I have to put 1/2 gallon or 1 gallon in it every day.I have yet to c one drop of water coming from my van wen the water runs low the heat won't work.but wen I p… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
gmc jimmy: I have a 1990 gmc Jimmy s15 4x4 I can't seem to
I have a 1990 gmc Jimmy s15 4x4 I can't seem to get hot air or any air for that matter to blow through to the cab no defrost vent or floor heat at all I thought the blower motor was bad but changed it… read more
cartech
cartech
master tech
High School or GED
3,324 satisfied customers
i have a 03 gmc safari.... i cant redirect airflow it on ly
i have a 03 gmc safari.... i cant redirect airflow it on ly blows on the dash.... i found a vacuum line in the engine compartment unhooked... dont know where it goes.... its coming off a tee.... i kno… read more
Jerry
Jerry
Service consultant
Vocational, Technical or Trade Scho
13,108 satisfied customers
gmc envoy: Good afternoon. I have a 2003 GMC envoy 4.6 L.
Good afternoon. I have a 2003 GMC envoy 4.6 L. First problem was a/c heat would not shut off. Even when ignition was turned off. Pulled the fuse. Then replaced the blower resister module under passeng… read more
sprinkles08
sprinkles08
Technician
High School or GED
19,202 satisfied customers
GM SAFARI VAN: I have a 1998 gmc safari van. The a/c quit working.
I have a 1998 gmc safari van. The a/c quit working. I looked under the hood on the passenger side behind and below the accumulator, i think it is the vacuum reservoir. Above that is some kind of valve… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
203 satisfied customers
GMC Safari Van: I have a 2001 GMC Safari Van. I had my check
I have a 2001 GMC Safari Van. I had my check engine light checked at Auto Zone today and I got the following code (not a complete list): P1815 P0463 P0420 P0335 P0135 P0300 P0101 P1626 C0265 C0245 C02… read more
Eric
Eric
Retired
N/A
38,694 satisfied customers
GMC Yukon XL 1500 Denali: 2001 GMC Yukon Denali XL. Had no
2001 GMC Yukon Denali XL. Had no reverse gear, couldn't not back up. Forward gears were ok except that revved high and had to manually let go of gas pedal to shift into 4TH gear. Transmission rebuilt/… read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
34,196 satisfied customers
GMC Sierra 2500 HD SLE: 2004 GMC HD 6.6 the blower in the
2004 GMC HD 6.6 the blower in the cabin only runs on #3 or above. I havecan hear a clicking sound but it stops after the left temp is incresed. now all heat is not working, AC works?… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,968 satisfied customers
GMC Safari Van: I have a 2000 gmc safari, v6, automatic, with
I have a 2000 gmc safari, v6, automatic, with 112,000 miles. While traveling on level ground the a/c and vent all work fine but when I start up a grade and have to accellerate the ac will loose vacuum… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
GMC Sierra 1500: GMC Sierra 2005 auto dual climate control.
GMC Sierra 2005 auto dual climate control. issue: can only seem to get to 60degrees in vent. just had refrigrant replenshed. when I turn the recirc on and off, I do not hear a difference in the blower… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
GMC K1500 4x4: I pulled the engine for a rebuild and is now
I pulled the engine for a rebuild and is now back in. A/C worked b4 the engine was pulled, does not work now. Also, A/C/heater control unit in dash does not move air flow from dash to face to floor. B… read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
34,196 satisfied customers
GMC Safari: 2001 Safari. No heat in cab. Just replaced vacuum
2001 Safari. No heat in cab. Just replaced vacuum line from engine to harness. Can hear vacuum suction so I assume the vacuum pressure is sufficient. I assume there is something preventing the air con… read more
Randall C
Randall C
Auto Technician / Consultant
Vocational, Technical or Trade Scho
13,531 satisfied customers
GMC Safari Van: 2001 SAFARI VAN HAVE A VACUUM LINE BROKEN.
2001 SAFARI VAN HAVE A VACUUM LINE BROKEN. I HEAV THE NEW LINE. I CAN SEE WHERE IT CONNECTS TO THE HARNESS ON THE PASSENGER SIDE. I CONNOT HOWEVER LOCATE WHERE THE OTHEN EDN GOES. I PRESUNE IT ATTACHE… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
GM Yukon: My 2001 Yukon has no heat up front but has heat in
My 2001 Yukon has no heat up front but has heat in the back and both heater hoses are warm. I replaced my heater blower motor last winter. The air blows out the various vents. I don't seem to hear the… read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
34,196 satisfied customers
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.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Gm Tech (Cam)

Gm Tech (Cam)

GMC Mechanic

1,968 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

766 satisfied customers

16 years of experience

JFN1

JFN1

ASE Certified Technician

272 satisfied customers

GM Master Technician

Don - Mo Lurch

Don - Mo Lurch

ASE Certified Technician

248 satisfied customers

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

Mike S.

Mike S.

ASE Certified Technician

241 satisfied customers

GMC N.A.I.S.E. Certified Auto-Mechanic

< Previous | Next >

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.

Show MoreShow Less

Ask Your Question

x