1999 Chevrolet T7500 Engine: 7.8L L6; w/ SD7H15 Compressor; New w/ Clutch; w/ Sanden Compressor;. 2000 Chevrolet T7500 Engine: 7.8L L6; w/ SD7H15 Compressor; New w/ Clutch; w/ Sanden Compressor;. 2001 Chevrolet T7500 Engine: 7.8L L6; w/ SD7H15 Compressor; New w/ Clutch; w/ Sanden Compressor;.