Olympic White 2004 GMC Sierra 2500HD Work Truck 4WD Allison 1000 5-Speed Automatic Duramax 6.6L V8 Turbodiesel Duramax 6.6L V8 Turbodiesel, Allison 1000 5-Speed Automatic, 4WD. AUCTION BOUND-MECHANIC SPECIAL - AS IS This vehicle falls below our minimum standard because of its mileage and/or mechanical condition. It is being offered for sale AS-IS for a low price. This vehicle will go to a closed (dealer only) auction unless it is sold beforehand. -NOT INSPECTED - Other than a simple test drive, no mechanicâs inspection has been done to this vehicle. Recent Arrival! This 2004 GMC Sierra 2500HD Work Truck comes equipped with HD Handling/Trailering Suspension Package, Heavy-Duty Power Package (Heavy-Duty Rear Locking Differential), Heavy-Duty Trailering Equipment, Skid Plate Package, Work Truck Package (4-Speaker Sound System Feature), Duramax 6.6L V8 Turbodiesel, Allison 1000 5-Speed Automatic, 4WD, 16 x 6.5 Painted Steel Wheels, 3.73 Rear Axle Ratio, 4 Speakers, 4.10 Rear Axle Ratio, 40/20/40 Front Split-Bench Seat, 4-Wheel Disc Brakes, ABS brakes, Air Conditioning, AM/FM radio, Bumpers: chrome, Deep-Tinted Manual Rear Sliding Window, Driver door bin, Dual front impact airbags, Dual Heavy-Duty 770 CCA Batteries, Electronic Cruise Control w/Set & Resume Speed, Engine Block Heater, External Engine Oil Cooler, External Transmission Oil Cooler, Front anti-roll bar, Front dual zone A/C, Front License Plate Bracket, Front wheel independent suspension, Fully automatic headlights, Manual Camper-Style Outside Rear-View Mirrors, Passenger cancellable airbag, Passenger door bin, Passenger vanity mirror, Power steering, Rear step bumper, Solar-Ray Deep Tinted Glass, Tachometer, Tilt steering wheel, Variably intermittent wipers, Vinyl Seat Trim, and Voltmeter.