GMC

GMC troubleshooting questions? Ask a mechanic for answers

Ask an Expert,
Get an Answer ASAP!

Related GMC Questions
Have a 2016 Duramax put DEF fluid in its still not resetting
Have a 2016 Duramax put DEF fluid in its still not resetting down to almost 55 miles an hour … read more
Chris (aka-Moose)
Chris (aka-Moose)
GMC Technician
Vocational, Technical or Trade School
626 satisfied customers
2011 gmc diesel duramax speed limited to 7hm hr what do I
2011 gmc diesel duramax speed limited to 7hm hr what do I do … read more
Danny
Danny
Owner, lead mechanic
High School or GED
3,963 satisfied customers
The Def fluid is full but the code is saying that it's low.
The Def fluid is full but the code is saying that it's low. … read more
Wolfgang
Wolfgang
14 satisfied customers
Service exhaust fluid light came on read the code and it
Service exhaust fluid light came on read the code and it said reluctant heater we replaced that but do not know how to reset the system, engine is limited to 4 mph. … read more
JFN1
JFN1
ASE Certified Technician
Vocational, Technical or Trade Scho
270 satisfied customers
Diesel exhaust system service? speed limited to 4mph and i
diesel exhaust system service? speed limited to 4mph and i am 20 miles from town … read more
Chris (aka-Moose)
Chris (aka-Moose)
GMC Technician
Vocational, Technical or Trade School
626 satisfied customers
Getting a service message on my exhaust fluid system and is
getting a service message on my exhaust fluid system and is transitioning to 65mph … read more
Gabriel Grey
Gabriel Grey
Master Service Technician
Associates
451 satisfied customers
I have a 2015 GMC 2500 HD. My message was exhaust fluid
I have a 2015 GMC 2500 HD. My message was exhaust fluid system loss of power so I filled the DEF. It's been 2 days and it still won't reset even when I did everything according to the manuel. Can I re… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
2013 GMC Duramax has service exhaust fluid system message.
2013 GMC Duramax has service exhaust fluid system message. Tank has DEF in it. What is the cause of this and how do you reset. … read more
Dan
Dan
Auto Mechanics 1&2/diesel mech
The DES system won't reset after adding fluids. Diesel
I tried to unhook the battery to see if I could get a reset. … read more
roy
roy
Associate Degree
3 satisfied customers
Exhaust system is clogged and will not let the truck run.
exhaust system is clogged and will not let the truck run … read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,796 satisfied customers
Our DEF fluid was low on our GMC 3500 Sierra Denali. We
Our DEF fluid was low on our GMC 3500 Sierra Denali. We refilled but the warning hasn't gone away and now we are limited to 55mph. We have been driving for more than 5 minutes. … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
5,698 satisfied customers
Filled def tank and still won't go over 55 How do you reset
Filled def tank and still won't go over 55 How do you reset it? … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
I spend a lot of time on the road. i am retired. i usedto
I spend a lot of time on the road. i am retired. i usedto design and build 12V and 24V control systems. This winter my DEF started giving me strange readings. the tank was at 14% and it took maybe 1 g… read more
roy
roy
Associate Degree
3 satisfied customers
Oh I started my 2011 gmc duramax and the service diesel
Oh hello. I started my 2011 gmc duramax and the service diesel exhaust fluid soon light came on with the check engine light. … read more
virtual auto tech.
virtual auto tech.
High School or GED
5 satisfied customers
Resetting the exhaust fluid light on a 2500 hd, we replaced
we replaced the reductant heater and float and the light for exhaust service is flashing and truck cant go over 55 … read more
BOBBYSS
BOBBYSS
TECHNICIAN/ADVISOR
Associate Degree
8,343 satisfied customers
I have AGM see 2500 HD Dinali pick up truck with a diesel
I have AGM see 2500 HD Dinali pick up truck with a diesel engine. Recently I have noticed white smoke coming out from under the hood where the DEF fluid goes. Only on occasian and the fluid is full. T… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,796 satisfied customers
Service exhaust fluid system see owner's manual. Speed
Service exhaust fluid system see owner's manual. Speed limited to 55 miles an hour talk to GMC dealer he said it needed a new exhaust fluid tank because some of the sensors were bad couldn't just chan… read more
Jared D
Jared D
Shop Supervisor
Bachelor's
3 satisfied customers
GM Sierra 2500: My 2012 duramax just said poor exhaust fluid
My 2012 duramax just said poor exhaust fluid quality. Planning on draining and refilling. Any way to force the test for the fluid quality without going to dealer. I doubt their going to be open until … read more
BOBBYSS
BOBBYSS
TECHNICIAN/ADVISOR
Associate Degree
8,343 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

1,796 satisfied customers

GM Grand Master Technician 2007. 14 year experience.

Gary

Gary

ASE Certified Technician

1,588 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

626 satisfied customers

16 years of experience

Ron Z.

Ron Z.

- GMC Tech -

279 satisfied customers

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

JFN1

JFN1

ASE Certified Technician

270 satisfied customers

GM Master Technician

George H.

George H.

ASE MasterTechnician

228 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