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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 144 (Engine Mechanical - 4.3L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Oil Pump Disassemble

Oil Pump Disassemble

WARNING: This page is about a different car, the 2003 GMC Savana and 2003 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the oil pump driveshaft and oil pump driveshaft retainer.
    Fig 1: Removing Oil Pump Driveshaft & Oil Pump Driveshaft Retainer
    G02078143Courtesy 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.

  2. 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
    G02078144Courtesy of GENERAL MOTORS CORP.
  3. Remove the oil pump cover bolts.
    Fig 3: Removing Oil Pump Cover Bolts
    G02078145Courtesy of GENERAL MOTORS CORP.
  4. Remove the oil pump cover.
    Fig 4: Removing Oil Pump Cover
    G02078146Courtesy of GENERAL MOTORS CORP.
  5. Remove the oil pump drive gear and the oil pump driven gear.
  6. Matchmark the gear teeth for assembly.
    Fig 5: Removing Oil Pump Drive Gear & Oil Pump Driven Gear
    G02078147Courtesy of GENERAL MOTORS CORP.
    WARNING: Wear safety glasses in order to avoid eye damage.
  7. Remove the following items:
    1. The oil pump pressure relief valve spring straight pin
    2. The oil pump pressure relief spring
    3. The oil pump pressure relief valve
      Fig 6: Removing Oil Pump Pressure Relief Valve Spring Straight Pin, Spring & Valve
      G02078148Courtesy of GENERAL MOTORS CORP.
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