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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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Vocational, Technical or Trade Scho
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I have a 2011 diesel 2500hd GMC Sierra and was driving it
Hi I have a 2011 diesel 2500hd GMC Sierra and was driving it and the def warning cam on and told me poor quality and then the check engine light has come on to and also my def tank is filled and now m… read more
Chris Carr
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I was needing to do a global reset in my GMC Sierra Denali
Hi, I was needing to do a global reset in my GMC Sierra Denali 2500 duramax. Do I unhook both batteries and do the procedure? … read more
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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
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Andrew
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John 2011 gmc 2500 duramax, def heater fault, and service
hi john 2011 gmc 2500 duramax, def heater fault, and service def system see owners manual now, reduced speed to 55, i replaced heater and cleared fault, that is good now, however the reduced speed is … read more
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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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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
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
Chad Farhat
Chad Farhat
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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
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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
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The Def fluid is full but the code is saying that it's low.
The Def fluid is full but the code is saying that it's low. … read more
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2013 gmc duramax diesel: service exhaust fluid system
2013 gmc duramax diesel: service exhaust fluid system warning light and states will reduce speed. Filled DEF tank, warning persists … 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
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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
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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
shop foreman
Associate Degree
5,219 satisfied customers
I filled the DEF tank and the low DEF message won't clear.
I filled the DEF tank and the low DEF message won't clear. Now it's saying Action Required, fill DEF tank or speed will be limited to 65. I'm traveling and it's the weekend. Truck is 2016 Duramax. … read more
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Pete
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Gm Tech (Cam)

Gm Tech (Cam)

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GM Grand Master Technician 2007. 14 year experience.

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Don - Mo Lurch

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Mike S.

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