[Denny and Angie Miller]

2017 Duramax bought new. Only use is pulling the 5er, current mileage is 16,700 miles. Truck sits in the garage when not pulling, including all winter. DEF fill tube is under the hood, so filling from a box is easier for me, I've never filled from the pump. 1 time I had to buy off brand DEF box at a gas station, every fill other than that has been Blue DEF from the box from WM and Menards, zero issues. Im not afraid of using pump DEF, box is just easier for me.