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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
675 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
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Vocational, Technical or Trade Scho
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I have a 2015 GMC Denaili 2500hd the exhaust fluid is
Second opinion] I have a 2015 GMC Denaili 2500hd the exhaust fluid is showing 42 miles before dropping to 4 mph what can I do… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
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I have a 2013 GMC Denali Sierra HD and it shows engine codes
I have a 2013 GMC Denali Sierra HD and it shows engine codes p205B and p21DD. I know both deal with reductant heater issues. One is the heater and one is the sensor. If the sensor fails, will that sho… read more
Eric
Eric
Retired
N/A
33,614 satisfied customers
2011 duramax engine code P205B, code P205B have reset it 1
will try to fix it myself since GM wont take care of it … read more
Pete
Pete
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General auto certifications
29,945 satisfied customers
DEF sensor wont rest even though reservoir is full, no
DEF sensor wont rest even though reservoir is full … read more
Chris (aka-Moose)
Chris (aka-Moose)
GMC Technician
Vocational, Technical or Trade School
675 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
Automotive Diagnostic Specialist
General auto certifications
29,945 satisfied customers
My 2014 GMC 3500 displays "service exhaust fluid system"
My 2014 GMC 3500 displays "service exhaust fluid system" speed is now limited to 65 mph … read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,823 satisfied customers
Do i need a credit card first? 2011 gmc 2500 6.6L Duramax
do i need a credit card first? JA: Okay, I'll connect you to the mechanic to go over that information regarding your GM. Before I do, is there anything else you want him to know? Customer: 2011 gmc 25… read more
Mike S.
Mike S.
Vocational, Technical or Trade Scho
8,036 satisfied customers
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
shop foreman
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4,488 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
Automotive Diagnostic Specialist
General auto certifications
29,945 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
shop foreman
Associate Degree
4,488 satisfied customers
We purchased a used 2011 chevy diesel shuttle bus. we have
we purchased a used 2011 chevy diesel shuttle bus. we have run it without incident for almost a year. Now we have had it in the shop no less than 5 times for the same issue. The shuttle bus system is telling us the DEF fluid is poor quality. We buy PEAK brand which was recommended. The dealership cannot seem to correct this error and now the shuttle is telling us "max 55 mph upon restart" and as far as i have read that is the beginning of the end. We really need help here as our local dealership seems to be ill equipped to correct the problem. … read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
29,945 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
Master Auto Tech.
Master Auto Tech.
High School or GED
545 satisfied customers
2012 GMC Denali HD 6.6L diesel. Engine light came on. Got
2012 GMC Denali HD 6.6L diesel. Engine light came on. Got code P2BAD, NOX Exceedence-Root cause unknown. What is that all about?… read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
29,945 satisfied customers
I have a 2011 GMC Sierra 2500 and the warning on my dash
Hello I have a 2011 GMC Sierra 2500 and the warning on my dash says service exhaust fluid system check owners manual now and only allows me to drive 55 mph… read more
Tim Mohr
Tim Mohr
SHOP OWNER
Master's Degree
16,172 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
2,332 satisfied customers
GM 3500 hd: 2013 gmc 3500hd, reductant tank heater went out,
2013 gmc 3500hd, reductant tank heater went out, replaced it no has service exhaust fluid see owners manual on dash. ???… read more
Michael Moore
Michael Moore
Team leader, bumper to bumper tech.
Associate Degree
2,870 satisfied customers
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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

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

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

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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.

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