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I have a 2015.5 3500 gmc. I have a code showing that says,
I have a 2015.5 3500 gmc. I have a code showing that says, 'see owners manual now, 70 miles until 65 mph'. I've filled def tank but it is still showing. I only have 54000 on truck. Light duty, city dr… read more
Daniel Chaidez
Daniel Chaidez
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Diploma
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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
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Gm Tech (Cam)
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Vocational, Technical or Trade Scho
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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)
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I have a 2011 GM Sierra 3500hd with the duramax lml engine.
I have a 2011 GM Sierra 3500hd with the duramax lml engine. I have a service exhaust message and another that says on next fill up I will be limited to 4 MPH. I think the problem is the reductant heat… read more
Gm Tech (Cam)
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Service exhaust fluid system message stays on. Fluid is
Service exhaust fluid system message stays on. Fluid is full. … read more
Eric
Eric
Retired
N/A
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Exhaust fluid system will not reset. About 66000. 2016 Chevy
now I have a service prompt It's telling me 77 miles to 65 mph and to see owners manual… read more
Gabriel Grey
Gabriel Grey
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Just filled up the DEF but it's not resetting. 2015 3500 LTZ
just happened today. Got in the truck this morning and it said 60 miles under low speed, refill DEF. Normally it gives a good heads up, and I know it isn't empty. I put a jug of DEF in anyways, about 1.5 gallons, and it didn't make a difference. So I assume the level indicator is stuck? Not sending a signal? … read more
Pete
Pete
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General auto certifications
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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
roybelding
roybelding
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On the road and a way from home. DEF light on. Fluid
On the road and a long way from home. DEF light on. Fluid completely full. Down to 55 mph. How do I reset … read more
EricFromCT
EricFromCT
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2012 gmc denali 2500 duramax. the "service exhaust fluid
2012 gmc denali 2500 duramax. the "service exhaust fluid system" indicator came on. went to max xpeed 65, then to max speed 55, now in 65 miles it will go to 4mph. Had a bad battery and changed it. Ha… read more
Tim Mohr
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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
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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
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Have a 2015 gmc 3500 and i. And i put def fluid in before it
and i put def fluid in before it showed reduced speed to 65. How can i reset it back to normal … read more
Chris Carr
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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)
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2012 Silverado 3500 HD, Duramax, w/ 52,000 mi. (Just
2012 Silverado 3500 HD, Duramax, w/ 52,000 mi. (Just purchased) Check Engine Lamp on, Plus message "Exhaust Fluid Poor Quality" . Truck is in 65 mph limit, soon to drop to 55 mph. Added 2.5 gal. fresh… read more
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GMC 2015 Duramax LML V8 6.6L - DIC message SERVICE EXHAUST
GMC 2015 Duramax LML V8 6.6L - DIC message SERVICE EXHAUST FLUID SYSTEM - SEE OWNERS MANUAL . Filled DEF reservoir. Was not empty. Drove 60 miles still did not reset. Warning that it will reduce MPH t… read more
BOBBYSS
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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
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General auto certifications
33,643 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
roybelding
roybelding
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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

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Dave Nova

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ASE Master Certification. GM World Class Certification

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Chris (aka-Moose)

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JFN1

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Don - Mo Lurch

Don - Mo Lurch

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Mike S.

ASE Certified Technician

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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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