GM Service Manual Online
For 1990-2009 cars only

    Object Number: 720891  Size: SH
  1. Lubricate all oil pump parts with engine oil.
  2. Install the inner gear into the outer gear.
  3. Important: If gears are improperly installed in the front cover, the gerotor cover will not bolt on.

  4. Install the gears together into the front cover with the hub of the center gear facing the front cover.
  5. Notice: Refer to Fastener Notice in the Preface section.

  6. Install the oil pump gerotor cover and bolts.
  7. Tighten
    Tighten the oil pump gerotor bolts to 6 N·m (53 lb in).


    Object Number: 412482  Size: SH
  8. Install the pressure relief valve piston.
  9. Install the pressure relief valve spring.
  10. Tighten
    Tighten the pressure relief valve plug to 40 N·m (30 lb ft).


    Object Number: 720891  Size: SH
  1. Lubricate all oil pump parts with engine oil.
  2. Install the inner gear into the outer gear.
  3. Note: If gears are improperly installed in the front cover, the gerotor cover will not bolt on.

  4. Install the gears together into the front cover with the hub of the center gear facing the front cover.
  5. Caution: Refer to Fastener Caution in the Preface section.

  6. Install the oil pump gerotor cover and bolts and tighten to 6 N·m (53 lb in).

  7. Object Number: 412482  Size: SH
  8. Install the pressure relief valve piston.
  9. Install the pressure relief valve spring.
  10. Install and tighten the pressure relief valve plug to 40 N·m (30 lb ft).