- - - 2003 GMC Sierra 2500 Ext Cab 143.5" WB 4WD - Tilt Wheel, Engine Immobilizer/Vehicle Anti-Theft System, AM/FM Stereo, Additional Power Outlet(s), Air Conditioning, Climate Control - Auto, Climate Control - Dual, Seats-Front Bench-Split, Floor Mats-Front, Cloth Seats, Transmission-Overdrive-Switch, Headlights-Auto-Off, Reading Lamps-Front, Air Bag - Driver, Air Bag - Passenger, Power Steering, Brakes-ABS-4 Wheel, 4 Wheel Drive, 4 Wheel Disc Brakes, Intermittent Wipers, Daytime Running Lights, Tow Hooks-Front