GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Lucerne 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 1-2 Shift Solenoid Valve Replacement

Removal Procedure
  1. Remove the case side cover. Refer to Control Valve Body Cover Replacement .
  2. Disconnect the transaxle wiring harness.

    3. Object Number: 49377 Size: SH
  3. Using a small screwdriver or pick, remove the 1-2 shift solenoid valve retainer (314D) from the control valve body (301).
  4. Remove the 1-2 shift solenoid (315A).
  5. Remove the O-ring seal (316) from the 1-2 shift solenoid valve (315A) ONLY if it is damaged.

Installation Procedure

    Object Number: 49377 Size: SH
  1. Install a new O-ring seal (316) onto the 1-2 shift solenoid valve (315A), if it was removed.
  2. Install the 1-2 shift solenoid valve (315A).
  3. Connect the transaxle wiring harness.
  4. Hold the 1-2 shift solenoid valve (315A) in the control valve body (301). Install the 1-2 shift solenoid valve retainer (314D) into the control valve body (301).
  5. Install the case side cover. Refer to Control Valve Body Cover 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 ECM, PCM or TCM will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned.

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