GMC

GMC troubleshooting questions? Ask a mechanic for answers

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

Related GMC Questions
2005 6.6 LLY has been a very good starting truck in cold
2005 6.6 LLY has been a very good starting truck in cold weather. Recently it has really struggled to start when in the 20's and 30's. Starts right up when plugged in for for as little as 30 min. Repl… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
350 satisfied customers
I am the fleet mech. for a small company and we have a GMC
I am the fleet mech. for a small company and we have a GMC 2500HD 6.6 duramax LLY I just put a reman "o-reillys" engine in, have had turbo issues since. new wiring GM harness, new turbo, every compone… read more
Chris (aka-Moose)
Chris (aka-Moose)
GMC Technician
Vocational, Technical or Trade School
831 satisfied customers
I have a lly duramax. It is knocking really loud, almost
Second opinion] I have a lly duramax. It is knocking really loud, almost makes me think its a rod, blowing black smoke really bad but as i rev the engine it does get quieter as the rpms go up. there a… read more
Daniel Chaidez
Daniel Chaidez
Technician
Diploma
2,885 satisfied customers
2250 code. Sorry it's p2155. 2011 GMC 3500 HD with the
I've cleared the code but every time I put it in drive it comes back … read more
Expert
Expert
7,234 satisfied customers
05 GMS 6.6 NO START. GMC. SIARA SORRY FOR THE SPELLING. I
I CLEARED THE DANG CODES. . DID SAY BANK B OPEN CIRCUIT P2149? P0202 AND SO FORTH SEVERAL INJECTORS OARE WITH OPEN CIRCUITS … read more
Chris Carr
Chris Carr
Ase Master
Ase Master Tech
463 satisfied customers
I have a 2005 gmc 2500hd 6.6 duramax. Slt. Resetting the
I have a 2005 gmc 2500hd 6.6 duramax JA: What is the model of your '05 GMC? Customer: slt JA: Are you fixing your vehicle yourself? What have you tried so far? Customer: resetting the ecm JA: Anything… read more
Tim Mohr
Tim Mohr
SHOP OWNER
Master's Degree
17,855 satisfied customers
05 GMC K3500 6.6 liter. some times on start up engine starts
05 GMC K3500 6.6 liter. some times on start up engine starts clattering and getting dtc's P0201, P0202,P0203,P0204,P0205,P0206,P0207,P0208,P1294 and P2149.… read more
JFN1
JFN1
ASE Certified Technician
Vocational, Technical or Trade Scho
272 satisfied customers
2004 GMC 2500HD with 6.6 Duramax LLY. Driven through deep
2004 GMC 2500HD with 6.6 Duramax LLY. Driven through deep water, stalled, turned over but wouldn't start, now won't turn over. Removed air filter intake hose at throttle body to find that the engine i… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
2004 gmc topkick 6.6 duramax We have 4 injectors apparently
2004 gmc topkick 6.6 duramax We have 4 injectors apparently not firing. I ran a cylinder cutout because the truck had a bad mis and cylinders 2,3,5,8 are not firing as they did not change the sound or… read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
35,012 satisfied customers
Gmc 2500hd Diesel: I have a 2004.5 GMC 2500hd diesel with 163,000
I have a 2004.5 GMC 2500hd diesel with 163,000 miles. When I'm sitting at a stop light, after driving on a bumpy road, my truck starts loping and blowing blue smoke. This only happens when the truck i… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
31,720 satisfied customers
GMC Sierra 2500 HD SLT: I have a Duramax LLY that needs some
I have a Duramax LLY that needs some help to stay running on all 8. Getting P2149 code consistently. Randomly getting errors for 2, 3, 5, 8 injectors, sometimes none at all, just the 2149.… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
31,720 satisfied customers
Gmc sierra: I have a 2005 gmc 6.6 duramax lly. ive owned this
I have a 2005 gmc 6.6 duramax lly. i've owned this for 2 years, it has always had a miss. Ive replaced all the injectors in it. ive replaced the filter housing, the FRP. My balance rates are in the no… read more
Mike
Mike
Proprieter / Diagnostic Technician
High School or GED
19,815 satisfied customers
GM 3500 sierra: I have a 2005 3500 4x4 duramax, it went into
I have a 2005 3500 4x4 duramax, it went into limp mode on Friday. I stopped and shut it off for 5 min. it restarted and ran fine for 20 miles or so, then while on the freeway it did the same thing. I … read more
Michael Moore
Michael Moore
Team leader, bumper to bumper tech.
Associate Degree
2,871 satisfied customers
Gmc Sieraa 2500 HD: I have a 07 GMC 2500HD with the 6.6 duramax
I have a 07 GMC 2500HD with the 6.6 duramax been getting codes p0202 and p0205. tried checking the injectors for power and ground but cant seem to find power or ground on any of the injectors. the tru… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
31,720 satisfied customers
GMC GMC 2500 Hd: Hello, I have an 04 Duramax LLy that I am
Hello, I have an 04 Duramax LLy that I am getting an error code P0202 and P2149. What does that mean? If I understand what I have found on line; they are codes basically saying that the electrical con… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
GMC Sierra 2500 HD Classic SLT: 2005 GMC Duramax 6.6 Pulling
2005 GMC Duramax 6.6 Pulling codes 1209 and a few 302 306 308 misfired injector codes. What could podssibly be the cause... Changed fuel filter and filled tank up with a different run of fuel....… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
31,720 satisfied customers
GMC K2500 4x4: 2005 6.6 Duramax - it has suddenly begun to
2005 6.6 Duramax - it has suddenly begun to run rough and at times appears to lose power momentarily - i have changed the fuel filter and air filter - still the same problem Any ideas?… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
31,720 satisfied customers
GM Sierra 2500 HD: I had 2 codes pop up last week after I changed
I had 2 codes pop up last week after I changed my fuel filter P0672 and P1093, I have read previously that there is a kit to replace #2 and #7 but could I just need to replace #2, also could that be t… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
31,720 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

31,720 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

831 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

261 satisfied customers

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

Mike S.

Mike S.

ASE Certified Technician

245 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