GM Service Manual Online
For 1990-2009 cars only

    Object Number: 12026  Size: SH
  1. Install the secondary pump gears (205, 206) into the secondary pump body (203).

  2. Object Number: 12027  Size: SH
  3. Install the primary pump gears (201, 202) into the primary pump body  (200).

  4. Object Number: 12028  Size: SH
  5. Inspect the pump gears (201, 202, 205, 206). These gears must be installed with the dimples facing up.

  6. Object Number: 12029  Size: SH
  7. Install the scavenge pump cover (237) onto the primary pump body (200) over the dowel bushings (227). Tap the dowels in place to that they stick out of both the primary pump body and the scavenge cover.

  8. Object Number: 12030  Size: SH
  9. Install the scavenge pump cover and primary body assembly (200/237) onto the secondary pump body (203). Press the entire assembly firmly together.

  10. Object Number: 12031  Size: SH
  11. Install the oil pump driven shaft (207) into the pump assembly. The end of the shaft with the four notches is located in the secondary pump.
  12. Install the scavenge pump drive gear (223) over the pump driven shaft.

  13. Object Number: 12032  Size: SH
  14. Align the scavenge pump driven gears (224) next to the drive gear (223). Install the scavenge pump body (225) onto the scavenge pump cover. Locate the scavenge pump driven gear pins into the scavenge pump driven gears (224). Press firmly into position.
  15. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 12016  Size: SH
  16. Install the two 10-mm bolts (226) through the scavenge pump cover (237) to the scavenge pump body (225) and tighten to 11-13 N·m (8.0-9.5 lb ft).