Duramax 6.6L V8 Turbo Diesel with Allison 6-Speed Automatic Transmissioin. Hard to Find Short Box!! If you've been longing to find just the right 2012 Chevrolet Silverado 3500HD to get some work done, then stop your search right here. This truck is nicely equipped with features such as Convenience Package (Power-Adjustable Pedals For Accelerator & Brake, Rear-Window Electric Defogger, and Remote Vehicle Starter System), Interior Plus Package (Bluetooth For Phone, Dual-Zone Automatic Climate Control, and Steering Wheel Mounted Audio Controls), Off-Road Suspension Package, 6-Speed Automatic, 4WD, Cloth, ABS brakes, AM/FM Stereo w/CD Player/MP3 Playback, Driver 6-Way Power Seat Adjuster, EZ-Lift Tailgate, Inside Auto-Dimming Mirror w/Rear Camera Display, Power Windows w/Driver Express-Down, Rear Vision Camera, Speed control, Traction control, and Ultrasonic Rear Parking Assist. Whether you're sitting in the driver's