2003 Chevrolet C8500 Engine: 8.1L V8 GAS; W/O A.C.; Position: Fan, Alternator and Power Steering;. 2004 Chevrolet C8500 Engine: 8.1L V8 GAS; W/O A.C.; Position: Fan, Alternator and Power Steering;. 2005 Chevrolet C8500 Engine: 8.1L V8 GAS; W/O A.C.; Position: Fan, Alternator and Power Steering;.