Part Type: Serpentine Belt. 2002 Chevrolet Silverado 3500 Engine: 6.6L V8; with 105 Amp Alternator; with Single Alternator; without California Emissions System; Position: Main Drive;. 2003 Chevrolet Silverado 3500 Engine: 6.6L V8; with 105 Amp Alternator; with Single Alternator; without California Emissions System; Position: Main Drive;.