GMC Superban 2003 Automatic Gasoline For sale or trade Suburban 2003 2500HD Mileage unknown 6-liter engine 4L80 transmission Original chassis and mechanics New set of taillights and grille New suspension and shock absorbers New GM water pump New brake pads Half-life tires New compressor 71-degree thermostat Additions: True Cool transmission cooler 34-inch Full aluminum radiator 220 Amp alternator Optima AGM battery Yukon electric fans 6th Shield heat insulation