Express 3/4 Ton Van V8-305 5.0L VIN M SFI (1999)
13. Remove the heater outlet hose from the water pump.
14. Remove the water pump mounting bolts.
15. Remove the water pump and the gasket.
16. Clean and inspect the sealing surfaces of the engine block.
17. Clean the water pump mounting bolts, and check the threads for damage.
Installation Procedure
1. Install the gaskets and the water pump.
2. Apply GM P/N 12346004 or equivalent thread sealant on the water pump mounting bolts.
Notice: Refer to Fastener Notice in Service Precautions.
