GM Service Manual Online
For 1990-2009 cars only

Secondary Fluid Pump Replacement 5.3L Engine w/RPO HP2

Removal Procedure

  1. Remove the transmission oil pan. Refer to Automatic Transmission Fluid and Filter Replacement

  2. Object Number: 1280438  Size: SH
  3. Disconnect the secondary fluid oil pump electrical connector.

  4. Object Number: 1280443  Size: SH
  5. Remove the secondary fluid oil pump bolts.
  6. Remove the secondary fluid pump.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1280443  Size: SH
  1. Install the secondary fluid pump.
  2. Install the secondary fluid oil pump bolts.
  3. Tighten
    Tighten the bolts to 10 N·m (89 lb in).


    Object Number: 1280438  Size: SH
  4. Connect the secondary fluid oil pump electrical connector.
  5. Install the transmission oil pan. Refer to Automatic Transmission Fluid and Filter Replacement .
  6. Important: It is recommended that transmission adaptive pressure (TAP) information be reset.

    Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, the engine control module (ECM), powertrain control module (PCM) or transmission control module (TCM) will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned.

  7. Reset the TAP values. Refer to Transmission Adaptive Functions .