GMC

GMC troubleshooting questions? Ask a mechanic for answers

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

Related GMC Questions
Service trailer brakes and abs light on, replaced trailer
Service trailer brakes and abs light on , replaced trailer brake mod under the bed of my 2007 gmc 2500 duramax . Still say service trailer brakes. Checked fuses they are good . Replaced both front hud… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,837 satisfied customers
I want to install an oem brake control switch in my 2013 gmc
i want to install an oem brake control switch in my 2013 gmc 2500 hd and i would like some help on on the wiring … read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,837 satisfied customers
Got the P0571 code. Brake lights work. Pink wire 12v with
Hi, got the P0571 code. Brake lights work. Pink wire 12v with key on and blue/wht wire 12v with brake pedal pushed. What should I check next?… read more
Todd M
Todd M
Owner
ASE Certification
1,894 satisfied customers
My GMC 2500HD error message: "service trailer brake system"
My GMC 2500HD error message: "service trailer brake system" … read more
Tim Mohr
Tim Mohr
SHOP OWNER
Master's Degree
16,261 satisfied customers
Gmc truck 2011 sierra. have a service trailer brake warnng
gmc truck 2011 sierra. have a service trailer brake warnng lindicator coming on. replaced trailer tow relay. service warning still active. is it the trailer and traction control module? … read more
Don - Mo Lurch
Don - Mo Lurch
ASE Certified Technician
Vocational, Technical or Trade Scho
234 satisfied customers
2002 GMC 2500HD - Brake lights always on and right turn
2002 GMC 2500HD - Brake lights always on and right turn signal on, but does not flash. When it began: Hooked up new wiring on a trailer and the right turn signal/brake light wire on the trailer was sh… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,837 satisfied customers
GMC Sonoma: My '99 Sonoma's CCOT A/C won't engage the compressor-clutch,
My '99 Sonoma's CCOT A/C won't engage the compressor-clutch, and has a low-side reading of more than 100-psi. What color wire to the compressor-clutch is the "positive" lead? I'm trying to diagnose th… read more
GMWrencher
GMWrencher
Associate Degree
413 satisfied customers
GMC: there is no power at the blue wire in the 7 prong female
there is no power at the blue wire in the 7 prong female receptacle when the brake pedal is depressed to activate the electric over hydraulic trailer drake controller.we have a 2008 chevy silverado wi… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,837 satisfied customers
GMC Sierra 2500 HD WT: I have a 2007 GMC Sierra 2500 HD and
I have a 2007 GMC Sierra 2500 HD and I had to have all the towing package installed myself and this past weekend I had to go get a parts car for my sons and I noticed my brake controller didn't work. … read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,837 satisfied customers
GMC Sierra 2500 HD SLE: I have a 2009 Sierra 2500HD with integrated
I have a 2009 Sierra 2500HD with integrated rv brake controller. It's maximum voltage output is 10.9VDC which is not enough to fully activate my trailer brakes. I added an aftermarket brake controller… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,837 satisfied customers
gmc Sierra 2500 HD SLT: hi triston, i have a 2008 sierra 2500
hi triston, i have a 2008 sierra 2500 hd duramax and have a problem with the oem trailer brake controller module and i'm trying to locate it so i can change it. thank you. Dany.… read more
GMWrencher
GMWrencher
Associate Degree
413 satisfied customers
GMC C2500: C2500 rear running lights do not work HELP!!!!
C2500 rear running lights do not work HELP!!!! I need a color coded wiring diagram for the rear tail lights.… read more
Randall C
Randall C
Auto Technician / Consultant
Vocational, Technical or Trade Scho
12,806 satisfied customers
GMC Sierra 2500 HD: My 2007 GMC 2500 has the factory trailer
My 2007 GMC 2500 has the factory trailer brake controller. The service system light came on and I took it to a GM garage. They installed a new brake sensor and recallibrated. The system seemed to work… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,837 satisfied customers
GMC Sierra 3500: Hi the electric brake controller error is
Hi the electric brake controller error is still there. The problem is that since the closures the nearest GM dealer is 100km away. I took the truck to a local service station. They got the error code,… read more
Hal
Hal
owner/service tech
Vocational, Technical or Trade Scho
925 satisfied customers
GMC Sierra 3500: I had both batteries flat (main and aux) on
I had both batteries flat (main and aux) on my 2008 GMC Sierra 3500. I boosted it and its ok now, but I have a "service electric brake controller" message. I have checked fuses ok and it does detect w… read more
Hal
Hal
owner/service tech
Vocational, Technical or Trade Scho
925 satisfied customers
I have a 2004 chevy 2500hd diesel crew cab short bed. What
I have a 2004 chevy 2500hd diesel crew cab short bed. What is the max weight for towing on a ball? 5th wheel?… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,837 satisfied customers
GMC 2500 Series: I have 2006 2500hd and a month ago pulled
I have 2006 2500hd and a month ago pulled trailer and lights/brakes all worked properly. Yesterday hooked back up to trailer and everything but the electric brakes worked. However they did work when e… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
GMC Sierra 2500 HD SLT: I was trying to hookup a third brake
I was trying to hookup a third brake light on a cap I recently installed on my 2006 GMC 2500HD. I used suitcase connectors on the left rear brake light assembly. I accidentally blew the parking light … read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,837 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

1,837 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

55,711 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

< 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