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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 418 (Engine Mechanical - 4.2L 6-Cylinder (On-Vehicle)) >> Repair Instructions >> Oil Pump Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the engine front cover. Refer to Engine Front Cover Replacement .
  2. Remove the oil pump cover bolts.
  3. Remove the oil pump cover.
  4. Mark the inner and the outer gears in relation to the oil pump housing.
  5. Remove the inner and the outer oil pump gears.
    6. Fig 1: Removing Inner And Outer Oil Pump Gears
    G01706351Courtesy of GENERAL MOTORS CORP.
  6. Remove the oil pump pressure relief valve plug.
  7. Remove the oil pump pressure relief valve and the spring.
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