GM Service Manual Online
For 1990-2009 cars only

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Remove the transmission fluid pan and gasket from the transmission. Refer to Transmission Fluid Pan Removal .
  4. Remove the 3 valve body bolts.

  5. Object Number: 166199  Size: SH
  6. Remove the fluid filter screen (1) and gasket.
  7. Remove the torque converter clutch (TCC) solenoid pipes (2) from the following components:
  8. • The TCC solenoid (4)
    • The transmission fluid pump
    • The valve body
  9. Disconnect the electrical connector (3) from the TCC solenoid (4).
  10. Disconnect the electrical connectors (3) from the fluid pressure switch.
  11. Remove the 2 TCC solenoid bolts.
  12. Remove the TCC solenoid (4) from the reinforcement plate.

  13. Object Number: 166205  Size: SH
  14. Remove the 6 reinforcement plate bolts.
  15. Remove the reinforcement plate (1) from the transmission case.
  16. Remove the 4 piston servo cover bolts.
  17. Remove the piston servo cover (3) and the piston servo cover gasket.
  18. Notice: When lowering the control valve body assembly, disconnect the manual valve link from the parking lock and range selector lever. Use caution to avoid losing the check ball in the transmission case passage. When the valve body is removed, the check ball should drop out of the case passage onto the top of the valve body.

  19. Remove the following components from the transmission case:
  20. • The 9 valve body bolts (2)
    • The manual detent roller
    • The valve body
    • The transfer plate
    • The transfer plate gaskets
    • One check ball