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Filled lmy 2012 Duramax with DEF. It was 13 miles until
Filled lmy 2012 Duramax with DEF. It was 13 miles until reduced speed of 65 MPH. Started up and drove around the block. It did not reset. How do I reset? … read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,912 satisfied customers
2011 silverado 2500 HD got DEF poor quality warning i adde 3
2011 silverado 2500 HD got DEF poor quality warning i adde 3 1/2 gal blue DEF it has now restricted me to 55 how far can i drive a t 55 … read more
Daniel Chaidez
Daniel Chaidez
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Diploma
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My service exhaust system message with the mileage countdown
My service exhaust system message with the mileage countdown wont reset … read more
Gm Tech (Cam)
Gm Tech (Cam)
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Vocational, Technical or Trade Scho
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2012 GMC with duramax. Sierra denali. Check emissions system
Check emissions system warning on 60 miles till 65 mi/hr max. I'm in the middle of a trip I have 700 miles to go … read more
Andrew
Andrew
Master Diagnostic Technician
Associate of Occupational in Automotive Technology
330 satisfied customers
I put 5 gal of exhaust fluid in my 2012 3500 duramax and the
I put 5 gal of exhaust fluid in my 2012 3500 duramax and the error won't clear. I am now at 55 mph max speed. … read more
Gm Tech (Cam)
Gm Tech (Cam)
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Vocational, Technical or Trade Scho
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Exhaust Fluid Quality Low; Engine Code P249D, We are on a
Exhaust Fluid Quality Low; Engine Code P249D, We are on a long road trip and it is forcing the truck to go slower and slower. We were at 75, now max speed is 65 … read more
Eric
Eric
Retired
N/A
37,362 satisfied customers
I have a 2016 gmc diesel I got a warning light-to Service
I have a 2016 gmc diesel I got a warning light-to Service Exhaust fluid system.With no check engine light I brought it to my local shop they changed the two heaters one line heater and one tank heater… read more
Roy
Roy
shop foreman
Associate Degree
5,213 satisfied customers
Def light won't reset after adding fluid and speed has been
def light won't reset after adding fluid and speed has been reduced to 65 … read more
Chad Farhat
Chad Farhat
Owner
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2015 Duramax DEF light won't reset after adding fluid and
2015 Duramax DEF light won't reset after adding fluid and speed has been reduced to 55 mph. … read more
Chris Carr
Chris Carr
Ase Master
Ase Master Tech
664 satisfied customers
I have a 2011 Chevrolet 3500 with 6.6 duramax. I have
I have replace the def heater. Truck is in limp mode all test come back passed. But is stilll in limp mode and now says at next fuel fill will go to 4 mph . How do I reset this … read more
Chris (aka-Moose)
Chris (aka-Moose)
GMC Technician
Vocational, Technical or Trade School
766 satisfied customers
I have a 2012 GMC Sierra 2500 4x4 Duramax. The" keep driving
I have a 2012 GMC Sierra 2500 4x4 Duramax . The" keep driving till message disappears cleaning the exhaust filter " keeps coming on i read the manual an have driven until it went off 3 times. over the… read more
Lance Answer
Lance Answer
Master Auto Technician
Vocational, Technical or Trade School
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Service Exhaust Fluid System See Owners Manual Now. Im down
Service Exhaust Fluid System See Owners Manual Now. Im down to 55 MPH max by the time I got home. Had a Snap On Solus hooked to it and didn't see any codes what is wrong ?? 2012 LML Duramax 156k miles… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,912 satisfied customers
2015 duramax that has full Def tank and dash warning wont go
2015 duramax that has full Def tank and dash warning wont go away, any thoughts … read more
Robert Blackwell
Robert Blackwell
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Vocational, Technical or Trade School
156 satisfied customers
My husband's def system is saying that it is low. But the
My husband's def system is saying that it is low. But the resivior is full … read more
Roy
Roy
shop foreman
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2012 GMC Denali HD Duramax 6.6L diesel. Low DEF quality lamp
2012 GMC Denali HD Duramax 6.6L diesel. Low DEF quality lamp just came on. Last February we removed the tank and drained it out trying to correct other emission system issues. Have only put 2000 miles… read more
Jared D
Jared D
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Bachelor's
2,492 satisfied customers
2011 GMC Sierra 3500 HD w/6.6 L turbo diesel with 36,000
2011 GMC Sierra 3500 HD w/6.6 L turbo diesel with 36,000 miles. "Exhaust Fluid Poor Quality" warning just recently came on the DIC along with the engine light on the dash. Put 2.5 gal. of Blue DEF int… read more
Master Auto Tech.
Master Auto Tech.
High School or GED
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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
33,185 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
5,213 satisfied customers
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Meet the Experts:

Gm Tech (Cam)

Gm Tech (Cam)

GMC Mechanic

1,912 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

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929 satisfied customers

ASE Master Certification. GM World Class Certification

Chris (aka-Moose)

Chris (aka-Moose)

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JFN1

JFN1

ASE Certified Technician

272 satisfied customers

GM Master Technician

Don - Mo Lurch

Don - Mo Lurch

ASE Certified Technician

248 satisfied customers

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

Mike S.

Mike S.

ASE Certified Technician

241 satisfied customers

GMC N.A.I.S.E. Certified Auto-Mechanic

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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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