GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 LaCrosse 🢒 Transmission 🢒 Automatic Transmission - 4T65-E 🢒 Oil Pump Replacement

Removal Procedure

    Object Number: 48209 Size: SH
  1. Remove the case side cover. Refer to Control Valve Body Cover Replacement.
  2. Use a flat-bladed tool to disconnect the electrical connectors from the solenoid valves (315A, 315B, 322, 334 and 440), the TFP manual valve position switch (395) and the temperature sensor (391).

    3. Object Number: 164795 Size: MH

    Note: Do NOT remove the bolt (205) that holds the oil pump together.

  3. Remove the oil pump bolts (206, 207).

    4. Object Number: 48212 Size: SH
  4. Remove the oil pump (200) from the valve body (300).

Installation Procedure

    Object Number: 48212 Size: SH
  1. Install the oil pump (200) to the valve body (300).

    2. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 164795 Size: MH
  2. Install the oil pump bolts (206, 207).

    3. Tighten

        • Tighten the M6 X 1.0 X 85 bolts (207) to 12 N·m (106 lb in).
        • Tighten the M6 X 1.0 X 95 bolts (206) to 16 N·m (12 lb ft).

    Object Number: 48209 Size: SH
  3. Connect the electrical connectors to the solenoid valves (315A, 315B, 322, 334 and 440), the TFP manual valve position switch (395) and the temperature sensor (391).
  4. Install the case side cover. Refer to Control Valve Body Cover Replacement.

    5. Note: 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 ECM, PCM or TCM will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned.

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