K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
Vacuum Pump: Service and Repair
Disconnect battery ground cable.
Disconnect vacuum hose.
Loosen and remove vacuum pump belt.
Remove vacuum pump pulley to hub attaching bolts.
Remove pump and bracket from engine.
Remove bracket from pump. Hub must be pressed off vacuum pump and used on replacement unit. Use pump pulley remover No. J
25034-B and pump pulley installer No. J 25033-B.
Install bracket on pump.
Install pump and bracket on engine.
Install vacuum pump pulley and attaching bolts to hub.
Install vacuum pump belt and adjust belt to correct tension.
Connect vacuum hose to pump.
Connect battery ground cable.