paulsharvey
Elite Member
Didn't read every single post, but I'm dumb founded at the milage compared to the older Vortec 6000. My 6.0 2500HD 4x4, extended cab, got all of 12 mpg, highway, empty. Son's 1500HD crew cab 2wd gets about 11 mph, empty, and mostly highway. If these new 2500s are getting 15 MPG, that's fantastic.