GM Service Manual Online
For 1990-2009 cars only

Valve Body and Pressure Switch Repl.

Removal Procedure

  1. Remove the oil pan and the gasket. Refer to Oil Pan Replacement
  2. Disconnect the electrical connectors from the control valve body components.
  3. Remove the torque converter clutch (TCC) solenoid bolts.
  4. Remove the TCC solenoid assembly with the O-ring seal.
  5. Remove the wiring harness bolts and lay the wiring harness aside.

  6. Object Number: 29454  Size: SH
  7. Remove the pressure switch assembly bolts.
  8. Remove the pressure switch assembly.

  9. Object Number: 13895  Size: SH
  10. Remove the manual shift detent spring bolt.
  11. Remove the manual shift detent spring assembly.
  12. Remove the remaining control valve body bolts.

  13. Object Number: 29460  Size: SH
  14. Remove the manual valve link and the control valve body from the transmission case.
  15. Inspect the control valve body. Refer to Control Valve Body Disassemble for cleaning, inspection, and repair of the control valve body.

Installation Procedure

Notice: Install all the valve body bolts, then torque the bolts in a spiral pattern starting from the center, as shown. If you torque the bolts at random, you may distort the valve bores. This will inhibit valve operation.

  1. Install the control valve body and the manual valve link to the transmission case.

  2. Object Number: 29460  Size: SH
  3. Install the manual valve link to the transmission case.
  4. Important: When installing bolts throughout this procedure, be sure to use the correct bolt as specified:

       • M6 x 1.0 x 65.0 (1)
       • M6 x 1.0 x 54.4 (2)
       • M6 x 1.0 x 47.5 (3)
       • M6 x 1.0 x 35.0 (4)
       • M8 x 1.25 x 20.0 (5)
       • M6 x 1.0 x 12.0 (6)
       • M6 x 1.0 x 18.0 (7)


    Object Number: 13370  Size: SH
  5. Install the control valve body bolts.

  6. Object Number: 13895  Size: SH
  7. Install the manual shift detent spring assembly and the bolt.

  8. Object Number: 29454  Size: SH
  9. Install the pressure assembly and the bolts.

  10. Object Number: 29492  Size: SH
  11. Install the wiring harness and the bolts.
  12. Install the TCC solenoid, O-ring, and the bolts.
  13. Install the electrical connectors.

  14. Object Number: 29511  Size: SH
  15. Tighten the valve body bolts in a spiral pattern starting from the center, as indicated by the arrows.
  16. Tighten
    Tighten all the bolts to 11 N·m (97 lb in.).

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  17. Install the oil filter and the filter seal. Refer to Automatic Transmission Fluid and Filter Replacement
  18. Install the oil pan and the gasket. Refer to Oil Pan Replacement