The 2003 GMC Sierra is equipped with a Duramax Diesel Engine. Please contact our sales department @ for further details. This Sierra 2500hd's important features are: Duramax Diesel Engine, 4-Speed Automatic Overdrive transmission , It is powered by an effecient and economical 6.6L V8 OHV 32V, The Entertainment & Driver Information System is an AM/FM/Stereo With a CD Player, This Sierra 2500hd has Low Mileage for its age, it comes equipped with Factory Alloy Wheels, It features Premium Cloth Upholstery inside, The exterior finish is a beautiful grey color, complimented by a nice black interior shade, Air Conditioning, Daytime Running Lights for Safety, Driver Side Air Bag, Interval Wipers, Keyless Entry, Power Windows, Power Adjustable Exterior Mirror, Vehicle Anti-Theft, Front Air Dam, Leather Steering Wheel.