GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Malibu 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 6T40/6T45 🢒 Control Solenoid Valve and Transmission Control Module Assembly Replacement

Removal Procedure

  1. Remove the transmission control valve body cover. Refer to Control Valve Body Cover Replacement.

    2. Object Number: 1998829 Size: SH
  2. Disconnect the input speed sensor electrical connector (1).
  3. Disconnect the output speed sensor electrical connector (2).
  4. Disconnect the shift position switch electrical connector (3).

    5. Object Number: 1998830 Size: SH
  5. Remove the 3 control valve body bolts (1) M5 x 40.5.
  6. Remove the 12 control valve body bolts (2) M6 x 97.
  7. Remove the control solenoid valve assembly (3) with transmission control module.

    8. Notice: Use care when removing or installing the filter plate assembly. A broken or missing retaining tab may not adequately secure the filter plate to the control solenoid valve assembly, resulting in possible damage or contamination.

  8. Remove the control solenoid valve assembly filter plate (4). Discard the filter plate. It is not reusable.
  9. Inspect the pressure switch seals for damage or contamination. Replace the control solenoid valve assembly as necessary.
  10. Inspect the channel plate bolt pass through holes for damage or burnelling. Any damage could cause leaking. Replace as necessary.

Installation Procedure


    Object Number: 1998830 Size: SH

    Notice: Use care when removing or installing the filter plate assembly. A broken or missing retaining tab may not adequately secure the filter plate to the control solenoid valve assembly, resulting in possible damage or contamination.

  1. Install a NEW control solenoid valve assembly filter plate (4) to prevent fluid leaks past the fluid seals.
  2. Install the control solenoid valve assembly (3) with transmission control module.
  3. Hand start the control valve body bolts (1, 2).

    4. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 2000158 Size: SH
  4. Secure the 12 control valve body bolts (2) M6 x 97.

    5. Tighten
    Tighten the bolts in sequence to 10 N·m (89 lb in).

  5. Secure the 3 control valve body bolts (1) M5 x 40.5.

    6. Tighten
    Tighten the bolts in sequence to 8 N·m (71 lb in).


    Object Number: 1998829 Size: SH
  6. Connect the input speed sensor electrical connector (1).
  7. Connect the output speed sensor electrical connector (2).
  8. Connect the shift position switch electrical connector (3).
  9. Install the transmission control valve body cover. Refer to Control Valve Body Cover Replacement.