Alternator, 145 amps Battery, heavy-duty 600 cold-cranking amps maintenance-free with rundown protection and retained accessory power Brakes, 4-wheel antilock, front disc/rear drum Cooling, auxiliary external transmission oil cooler heavy-duty air-to-oil Cooling, external engine oil cooler heavy-duty air-to-oil, integral to driver side of radiator tank Differential, heavy-duty automatic locking rear Engine, Vortec 5.3L Variable Valve Timing...