2003 Chevrolet W4500 Tiltmaster Engine: 6L V8 GAS; Position: Alternator and Power Steering;. 2004 Chevrolet W4500 Tiltmaster Engine: 6L V8 GAS; Position: Alternator and Power Steering;. 2005 Chevrolet W4500 Tiltmaster Engine: 6L V8 GAS; Position: Alternator and Power Steering;.