Inspection Procedure

Fig 1: Identifying Oil Pump Housing Inspection Locations (LGX)
Courtesy of GENERAL MOTORS COMPANY

NOTE:
There are no serviceable components within the oil pump. Disassemble the pump only to diagnose an oiling concern. A disassembled oil pump must not be reused. A disassembled oil pump must be replaced.

Inspect the oil pump housing for the following:
- Damage to the vacuum pump seal surface (1)
- Damage to the oil pump mounting bosses (2)
- Damage to the oil pump housing seal surface (3)
- Damage to the oil pump housing seal surface (4)
- Damage to the gear (5)
- Damage to the gear (6)
- Damage to the mounting surface for the suction pipe (7)