Oil Pump Disassemble

WARNING: This page is about a different car, the 2003 GMC Safari and 2003 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.

Remove the oil pump driveshaft and oil pump driveshaft retainer.

Fig 1: Removing Oil Pump Driveshaft
Courtesy of GENERAL MOTORS CORP.

Important: Do not remove the oil pump screen from the pipe. The pipe and oil pump screen are serviced as a complete assembly.
Remove the oil pump screen, if necessary. The oil pump screen has a press fit into the oil pump cover.

Fig 2: Removing Oil Pump Screen
Courtesy of GENERAL MOTORS CORP.
Remove the oil pump cover bolts.

Fig 3: Removing Oil Pump Cover Bolts
Courtesy of GENERAL MOTORS CORP.
Remove the oil pump cover.

Fig 4: Removing Oil Pump Cover
Courtesy of GENERAL MOTORS CORP.
Remove the oil pump drive gear and the oil pump driven gear.

Fig 5: Removing Oil Pump Drive Gear
Courtesy of GENERAL MOTORS CORP.
Matchmark the gear teeth for assembly.
CAUTION: Refer to SAFETY GLASSES CAUTION in Cautions and Notices.
Remove the following items:
1. 7.1. The oil pump pressure relief valve spring straight pin
2. 7.2. The oil pump pressure relief spring
  
  Fig 6: Removing Oil Pump Pressure Relief Valve Spring
  Courtesy of GENERAL MOTORS CORP.
3. 7.3. The oil pump pressure relief valve