Silverado 2500 v 3500 fuel mileage ?
Like we buy these for fuel saving but . . . Has anyone who's owned both noticed any difference in fuel mileage between a Duramax in a 2500 and a Duramax in a 3500 frame?
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I had a 2008 2500 CC 6.5' box and now have a 2011 3500 CC DRW 8' box. Mileage is the same but the motors are different between those years. 2008 had no 9th injector and no DEF.
