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guidry's avatar
guidry
Explorer II
Sep 23, 2013

Emissions check engine light on 2013 Chevy 3500 Duramax?

After about a half tank towing on the freeway all day my check engine light came on and the manual shows it to be emissions related. Diesel cap is ok, I'm guessing bad batch of diesel (truck stop). I ...
Tow Vehicles
REWahoo's avatar
REWahoo
Explorer
Sep 23, 2013
FishOnOne wrote:


My vote is your truck is reporting "Contaminated DEF" that I see so much with the GM diesel trucks.


Not likely. If it was bad DEF the DIC would indicate it with a "Poor DEF quality" message.

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