1st DEF fill up
Filled the DEF for the 1st time today. Took 4.2 gallons. Mileage was 5400. According to the calculator, that equates to just under 1300 miles per gallon. Dash info center said I had 470 miles left on ...
Forum Discussion
ktmrfs wrote:
GM says they sized the DEF tank to require filling about every oil change.
Actually they sized it so you could easily drain it on any rocky road. :B
