GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1998 🢒 Century 🢒 Engine 🢒 Engine Controls - 3.1L 🢒 Solenoids and Wiring Harness Replacement

Removal Procedure
  1. Remove the case side cover. Refer to Control Valve Body Cover Replacement

    2. Object Number: 164788 Size: SH
  2. Use a small flat-bladed tool in order to remove the wiring harness (224) from the case electrical connector (35).

    3. Object Number: 10505 Size: SH
  3. Use a small flat-bladed tool in order to remove the wiring harness from the solenoid valve(s) and/or the sensor.
  4. Remove the oil pump in order to access the Torque Converter Clutch (TCC) Pulse Width Modulated (PWM) solenoid (325). Refer to Oil Pump Replacement
  5. Remove the clips retaining the solenoid(s).

    6. Object Number: 29363 Size: SH
  6. Remove the solenoid(s).

    7. Object Number: 12968 Size: SH
  7. Remove the 2-3 shift solenoid (315).

    8. Object Number: 13009 Size: SH
  8. Inspect the wiring harness (224) for the following:
    9. • Cut or pinched wires
    • Cut wire insulation
    • Bent or broken electrical connectors

Installation Procedure

    Object Number: 12968 Size: SH
  1. Install the 2-3 shift solenoid (315).

    2. Object Number: 29363 Size: SH
  2. Install the solenoid(s).
  3. Install the retaining clips.
  4. Install the oil pump, if removed. Refer to Oil Pump Replacement

    5. Object Number: 13010 Size: SH
  5. Install the wiring harness to the electrical connector in the case, the solenoid valve(s) and/or the sensor.
  6. Install the case side cover. Refer to Control Valve Body Cover Replacement