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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
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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
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Check engine light is on. got a 21dd code. Stays on. 2015
gonna fix it myself. haven't tried anything yet. says the def tank heater circuit is the prob … read more
fordguy4u
fordguy4u
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I have a check engine light that shows the reductant heater
I have a check engine light that shows the reductant heater sensor is difective … read more
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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
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Driving down freeway and it just died, codes are P1164,
driving down freeway and it just died, codes are P1164, P128E and P11DB … read more
BOBBYSS
BOBBYSS
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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
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Working on a 2012 2500 GMC with the 6.6 duramax got a # 4
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Chris (aka-Moose)
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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
heavy_chevy_396
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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
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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.
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Egr valve code were is egr located? : p0401 6.6 diesel :
sets code,,P0101 replaced air mass ,,set 3 codes again p0101.P02380 &p0401,,same codes reoccur after clear codes,usally in a weeks time or so … read more
C. Walker, Jr.
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2011 GMC Duramax 3500 LML. Needed a high pressure injection
2011 GMC Duramax 3500 LML. Needed a high pressure injection pump. After repairs on the DIC is displays "Service exhaust fluid system now". … read more
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Resetting the exhaust fluid light on a 2500 hd, we replaced
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BOBBYSS
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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
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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
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GMC 2500HD: 01 GMC 2500HD 6.6 ALLISON TRANS. STARTED OUT WITH
01 GMC 2500HD 6.6 ALLISON TRANS. STARTED OUT WITH CODE 1713 REPLACED PRESSURE SWITCH AND HARNESS BECAUSE IT WAS LEAKING AROUND PLUG CHANGED FLUID AND FILTER . THAN IT CAM E BACK P0712 CODE, REPLCED SW… read more
Gary
Gary
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Vocational, Technical or Trade Scho
1,589 satisfied customers
2003 GMC C2500HD, 6.6 Diesel, buket seats w/ console. Problem:
2003 GMC C2500HD, 6.6 Diesel, buket seats w/ console. Problem: loosing coolant, leaking from small hose through fire wall, assume its heater core. Question: Can heater core be replaced from inside cab… read more
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Gary
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Vocational, Technical or Trade Scho
1,589 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

54,183 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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