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I have a GMC Sierra 2500 HD 37000 miles. I had battery
I have a GMC Sierra 2500 HD 37000 miles. I had battery problems. Started truck with low batteries. Truck DIC indicated a check engine light and DEF service now. DEF was not that low but filled it up a… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,912 satisfied customers
We have a 2015 Chevy 3500 duramax. We are getting code p249d
We have a 2015 Chevy 3500 duramax. We are getting code p249d and exhausted fluid quality poor. We added more def and diesel. We are getting out speed reduced. What can we do? … read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,912 satisfied customers
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
Technician
Diploma
2,251 satisfied customers
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)
GMC Mechanic
Vocational, Technical or Trade Scho
1,912 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)
GMC Mechanic
Vocational, Technical or Trade Scho
1,912 satisfied customers
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
Automotive Diagnostic Specialist
General auto certifications
33,949 satisfied customers
Def tank doesnt reset after filling. 2015 serria 2500. Fix
yes fix myself only filled and noticed its not resetting … read more
Richard Greer
Richard Greer
Online Automotive Repair Consultant
Vocational, Technical or Trade School
1,251 satisfied customers
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
Auto Technician
5,327 satisfied customers
P01F0 code 2015 Duramax, I've cleared the code multiple
Just clearing the code with my code reader and it comes back a few times. I live where it's cold. … read more
Ron
Ron
Automotive Tech
Vocational, Technical or Trade Scho
39,996 satisfied customers
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
Chris Carr
Ase Master
Ase Master Tech
463 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
My DEF is full but computer did not reset and I am now
My DEF is full but computer did not reset and I am now restricted to 55 mph … read more
Eric
Eric
Retired
N/A
38,386 satisfied customers
The check engine light came on and when I plugged in my
The check engine light came on and when I plugged in my INNOVA tester it showed a code that was either POIFO or PO1FO and I was trying to see what that code was for … read more
david craig
david craig
OWNER/MECHANIC
Associates
9,714 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
752 satisfied customers
Low Power Mode and error codes U0107, P0120, P0220, 280k.
Low Power Mode and error codes U0107, P0120, P0220 … read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
2011 duramax. Def level warning message came on saying 219
2011 duramax. Def level warning message came on saying 219 miles till empty. 2 weeks earlier I had added a 2.5 gallons. I bought another thinking it would clear. It didn't I bought another and it spoi… read more
roybelding
roybelding
shop foreman
Associate Degree
5,350 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
33,949 satisfied customers
EXHAUST FLUID LOW SPEED LIMITED SOON HAS SHOWED UP AT
EXHAUST FLUID LOW SPEED LIMITED SOON HAS SHOWED UP AT STARTUP FOR 4DAYS I HAVE FILLED THE TANK ONDAY ONE HOW CAN I GET THIS PROBLEM FIXED? 2011 SILVERADO HD HAD THIS PROBLEM 2 TIME IN YEAR 2 GM FIXED … read more
MPMoore
MPMoore
Team leader, bumper to bumper tech.
Associate Degree
2,871 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

GMC Technician

929 satisfied customers

ASE Master Certification. GM World Class Certification

Chris (aka-Moose)

Chris (aka-Moose)

GMC Technician

766 satisfied customers

16 years of experience

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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