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2013 gmc duramax diesel: service exhaust fluid system

2013 gmc duramax diesel...

2013 gmc duramax diesel: service exhaust fluid system warning light and states will reduce speed. Filled DEF tank, warning persists

Mechanic's Assistant: Do you have the trouble code? Do you have a code reader or scan tool?

"Service exhaust fluid system". No code

Mechanic's Assistant: I'll pass this info along to the GM Mechanic so that he can get you a quick fix. What is the model of your '13 GMC?

Sierra SLT 2500

Mechanic's Assistant: Are you fixing your Sierra yourself? What have you tried so far?

Filled DEF

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Ambient temp 44 F

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Answered in 7 hours by:
11/24/2017
Chris (aka-Moose)
Chris (aka-Moose), GMC Technician
Category: GMC
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Welcome, I'm Chris (aka Moose).

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There has to be a code stored, if not then your scan tool may not be sophisticated enough.

Some of the more common DEF tank concerns on this model are the NOX sensors or injector, tank contamination or heater issues.

Now that I have posted a partial or complete answer, you will see you can rate me. The deposit you have already paid is not transferred to me until you rate me. I would like to receive nothing less than 5 star excellent ratings. So if we are not there yet, please reply and let me help more. If you're not pleased, let me know because rating bad does not result in a refund, there are better options. Rating now will not close this post nor prevent replying. Thanks Chris

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Customer reply replied 7 months ago
Good
Customer reply replied 7 months ago
Headed to dealership thanks. Knowledge is power

Glad I could help

Chris (aka-Moose)
Chris (aka-Moose), GMC Technician
Category: GMC
Satisfied Customers: 52,174
Experience: 16 years of experience
Verified
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