Check out this 2012 GMC Sierra 3500HD Denali. Its Automatic transmission and Turbocharged Diesel V8 6.6L/403 engine will keep you going. This GMC Sierra 3500HD has the following options: WINDOW, POWER, REAR SLIDING, TRANSMISSION, ALLISON 1000 6-SPEED AUTOMATIC, ELECTRONICALLY CONTROLLED with overdrive, electronic engine grade braking and tow/haul mode, TRAILERING WIRING PROVISIONS, FOR CAMPER, FIFTH WHEEL AND GOOSENECK TRAILER includes additional 7-way wiring harness routed to front of pickup box, TIRES, LT235/80R17E ALL-SEASON HIGHWAY, BLACKWALL (STD), SUNROOF, POWER with express-open,, SUMMIT WHITE, SEATS, FRONT BUCKET includes 12-way power driver and front passenger seat adjusters, 2-way power lumbar control, heated seat cushions and seatbacks, 2-position driver memory, adjustable outboard head restraints, floor console, dual inboard armrests and storage pockets (STD), REAR AXLE, 3.73 RATIO, PAINT, SOLID, and NAVTRAFFIC is available in over 100 markets and works with your vehicle's navigation system to give you continuously updated traffic data right when you need it most - while you're driving. You'll avoid traffic tie-ups, save time and gas by getting alternate routes, and, in some cases, receive traffic speed and drive-time information. Plus, you can use NavTraffic at the same time you're enjoying SiriusXM Satellite Radio. You'll find that once you start using NavTraffic, you won't want to drive without it..