Dorman Vacuum Pump Pulley For 1988-2000 GM 6.2L/6.5L Diesel 300-702 Dorman Vacuum Pump Pulley For 1988-2000 GM 6.2L/6.5L Diesel 300-702 Please Call For Availability. The Dorman 300-702 Vacuum Pump Pulley is an integral part of the drive system for the belt driven vacuum pump in your 1988-2000 GM 6.2L/6.5L Diesel... MSRP: Was: Now: $85.32 Add to Cart The item has been added