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  1. Duramax Fifth Generation: 2011-2016 (LML)
    I was sitting at about 18% or so left on my DEF tank and about 200 miles according to the warnings flashing on my DIC. The manual says the DEF tank holds 5.3 gallons, I purchased 5 gallons of DEF in the 2.5 gallon jugs. I figured that would fill it with some left over. It drank up all 5...
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