GMC

GMC troubleshooting questions? Ask a mechanic for answers

Ask an Expert,
Get an Answer ASAP!

Related GMC Questions
2010 GMC Terrain Cruise control doesn't work properly Once
second opinion] 2010 GMC Terrain Cruise control doesn't work properly Once engage the rpm goes down and goes very high… read more
Chris (aka-Moose)
Chris (aka-Moose)
GMC Technician
Vocational, Technical or Trade School
675 satisfied customers
My 2003 avalanche is backfiring when I go above 60 mph or
my 2003 avalanche is backfiring when I go above 60 mph or pull a load … read more
Ryan Schott
Ryan Schott
76 satisfied customers
My gmc c4500 wont go over 25 mph, c4500 service truck 2007,
new gas pedal, throttle body, checked wires, all good … read more
GM Bob
GM Bob
Automobile Technician
High School or GED
1,081 satisfied customers
2007 gmc sierra with 6.0 when I press the brake pedal at low
2007 gmc sierra with 6.0 when I press the brake pedal at low speeds abs pump kicks in and peddl goes to floor. when I monitor live data on test drive all 3 speed sensors read 3 mph while im standing s… read more
George H.
George H.
ASE MasterTechnician
Associate Degree
230 satisfied customers
I bought a 2004 GMC Envoy XL. The truck starts up great, but
I bought a 2004 GMC Envoy XL. The truck starts up great, but when you drive it there's a clunking and I think somethings wrong with the transfer case or tranny. How can I check and are there known iss… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
18,051 satisfied customers
Gmc yukon: 2007 Yukon xl wouldn't start. jumped it, but since
2007 Yukon xl wouldn't start. jumped it, but since it has had a sluggish start by not cranking over right away, and going uphill it started losing power and didn't respond when accelerated. Also, the … read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
29,925 satisfied customers
GMC Yukon XL 1500 Denali: I have a 2007 yukon Denali with a
I have a 2007 yukon Denali with a 6.2. After driving for 50 miles plus at highway speeds when you slow down the engine quits. It won't start back up for a couple hours. I had cam sensor replaced a cou… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
18,051 satisfied customers
GMC Sierra 1500: Hello, I have an 09 GMC Sierra 5.3l. Every
Hello, I have an 09 GMC Sierra 5.3l. Every once in a while when I am at a stop light my truck rpm goes down and it feels like it could stall. The idle goes up and down slightly. Is this normal. Should… read more
JFN1
JFN1
ASE Certified Technician
Vocational, Technical or Trade Scho
272 satisfied customers
GMC Envoy SLT: Accelerator Problem between 50-60 MPH
When driving between 50-60 MPH my 2007 GMC Envoy SLT hestitates/misses, like it is running out of fuel. If I take my foot off the gas and then reapply, it maintains the speed and continues to accelera… read more
Tim\u0027s Auto Repair
Tim\u0027s Auto Repair
Mechanic
High School or GED
14,660 satisfied customers
2007 avalanche when you turn on the key power turns on and
2007 avalanche when you turn on the key power turns on and won't start. noticed that the alt gauge and fuel gauge are not working.door locks do not work WONDERING WHY NO REPLY PAID 2 HOURS AGO… read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
29,925 satisfied customers
GMC Yukon: My vehicle is a 2005 GMC Yukon with a 5.3L Motor
My vehicle is a 2005 GMC Yukon with a 5.3L Motor that I had a diagnostics performed on. Recently we started to notice a delay when put in drive going from 1st to 2nd gear. The DTC codes P0522 and C029… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,823 satisfied customers
GMC 1500 Series: why does my 05 gmc serria truck blow hot air
why does my 05 gmc serria truck blow hot air when you drive and the rpms are going up but when in park, slowing down, and you get in over drive st a good speed it goes cold… read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
29,925 satisfied customers
GMC Sierra K3500: I have a 1999 GMC Sierra k3500 with a 6.5
I have a 1999 GMC Sierra k3500 with a 6.5 diesel. The auto transmission made a high pitch noise as I'm on the highway traveling at 60 mph. Now it still engages but jumps out of gear and it clunks when… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
18,051 satisfied customers
GMC: I have a 2007 GMC 1500 the tranny was acting up it
I have a 2007 GMC 1500 the tranny was acting up it would not take the 2nd gear the way it was suppose to kind of slipping as it was taking at so the the tranny was rebuilt completely. But it still doe… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
GMC: Have an 03 avalanche 1500 4x4. Loud intermittent chirping
Have an 03 avalanche 1500 4x4. Loud intermittent chirping and flapping coming from A/C drive.Have had tensioners replaced,even the harmonic balancer. Shredded one belt and is working on 2nd.Happens mo… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
18,051 satisfied customers
GMC Envoy Denali: I have a 2006 GMC Envoy Denali I bought 2
I have a 2006 GMC Envoy Denali I bought 2 months ago with 32,000 miles on it. I just started to hear this ticking noice only at 2,000 RPM. It makes the noise in neutral when I rev it up and also while… read more
tripletauto
tripletauto
Shop Foreman
Associate Degree
238 satisfied customers
GMC K1500 Sierra 4x4 crew cab: I have a 2008 GM Sierra 1500
I have a 2008 GM Sierra 1500 5.3. When I'm driving on the highway at approximately 67 70 miles an hour the engine goes into the v4 mode and you hear are louder than normal noise in the exhaust does GM… read more
Doug
Doug
Head technician
High School or GED
394 satisfied customers
gmc: 2001 gmc sierra 2500 4l80 trans slipping. If im easy in
2001 gmc sierra 2500 4l80 trans slipping. If im easy in it n stay under 3k rpm it drives and shifts fine but if i get on it the rpms go up n speed does not increase. What could this be?… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
18,051 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

1,823 satisfied customers

GM Grand Master Technician 2007. 14 year experience.

Gary

Gary

ASE Certified Technician

18,051 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

675 satisfied customers

16 years of experience

Ron Z.

Ron Z.

- GMC Tech -

285 satisfied customers

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

JFN1

JFN1

ASE Certified Technician

272 satisfied customers

GM Master Technician

George H.

George H.

ASE MasterTechnician

230 satisfied customers

15+ Years ASE Master Technician with Level 1 Certification

< 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