2005 GMC Sierra 2500HD Consumer Discussions

Chevy Silverado and GMC Sierra Duramax Fuel Mileage

Re: DURAMAX FUEL MILEAGE [blackmax]

Written by: fxwg82 on Sep 13, 2005 10:25 PM

I have a 2005 GMC Sierra, 2500HD crew cab, 4x4 w/ D/max and the mighty Allison trans.. I've owned a new duramax every year since '01. I've loved them all. Even through all the injector problems. I've always gotten 15-20 mpg no matter what I pulled or how I drove. I now get 11 mpg and I try to keep my foot out of it. I've been looking at the new Preditor chip for better economy ... Read More...