Hi Wareagle 5693,
Welcome to the Chevy forums.
You'll love the crewcab roominess, and the back seat storage.
My 04 2500HD was getting 11.5 MPG highway from the factory, after I installed a fiberglass cap over the bed, it started getting @14MPG. Low end torque is not as important as MPG to me, so I converted to 342 gears for the highway travel, and now I see @18MPG highway.
They used to come with 410 gears standard, but I can't speak for the newest models.
If you like a firm, solid ride, I think you'll appreciate the E-radials and the 2500HD suspension.
Last edited by therewolf; 10-15-2009 at 04:55 PM.