GM Service Manual Online
For 1990-2009 cars only

    Object Number: 1581029  Size: SH
  1. Remove 2 detent spring bolts (1).
  2. Remove the manual shift shaft detent spring (2).

  3. Object Number: 1633290  Size: SH

    Important: Six gold colored bolts retain the modulated main valve body. Four of these bolts assist in retaining the control valve body. The modulated main valve body is removed as part of the control valve assembly disassemble procedure.

  4. Remove 11 control valve body assembly bolts (1).
  5. Remove 4 bolts (2) from the modulated main valve body and control valve body.

  6. Object Number: 1581032  Size: SH

    Important: Installing a lint-free cloth into the park pawl apply assembly guide hole prevents the manual valve pin from falling into the transmission.

  7. Install a lint-free cloth (1) in the park pawl apply assembly guide hole in the transmission case (2).

  8. Object Number: 1581033  Size: SH

    Important: Do not drop the manual valve when removing or installing the control valve body assembly onto or from the transmission case.

    Placing a finger over the end of the manual valve hole when removing the control valve body assembly from the transmission case prevents the manual valve from falling free of the bore.

  9. Lift the control valve body assembly (2) until the 2 locating pins (1) of the control valve body assembly are disengaged from the transmission case.

  10. Object Number: 1581034  Size: SH
  11. Slide the control valve body assembly to the side and disengage the manual valve pin (2) from the manual shift shaft detent lever/IMS assembly (1).
  12. Remove the control valve body assembly from the transmission case.

  13. Object Number: 1581037  Size: SH
  14. Remove, as a unit, the manual valve (2) and the manual valve pin (3) from the shift valve body assembly (1).
  15. Remove the manual valve pin (3) from the manual valve (2).

  16. Object Number: 1358244  Size: SH
  17. Remove the lint free cloth (1) from the park pawl apply assembly guide hole in the transmission case (2).