GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 Sierra - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - Allison 🢒 Control Valve Body Assemble

Special Tools
    •  J 33163 Valve Tray Set
    • J 43773 Valve Spring Compressor

    Object Number: 1331397 Size: SH
  1. Position main valve body assembly (4) on the work table so that the worm-track side is up.
  2. Align separator plate (2) with main valve body locating pins (3).
  3. Install separator plate (2).
  4. Align shift valve body assembly (1) with main valve body locating pins (3).
  5. Install the shift valve body assembly onto the separator plate.

    6. Object Number: 1633330 Size: SH
  6. Position the control valve assembly on the work table so that the main valve body is facing up.

    7. 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.

  7. Install 11 bolts (1) retaining the valve bodies together.

    8. Tighten
    Tighten the bolts to 12 N·m (108 lb in).


    Object Number: 1331386 Size: SH
  8. Position the control valve assembly on the work table so that the shift valve body is up.

    9. Important: 

       • O-ring (4) is slightly larger than O-ring (3).
       • P/N 29536833 is printed on the shift solenoid 1 (SS1) (5).

  9. Install the solenoid O-ring (4) onto the SS1 (5).
  10. Install the solenoid O-ring (3) onto the SS1 (5).
  11. Align the SS1 (5) so that the electrical connector points away from the nearest locating pin and is parallel to the separator plate as shown.
  12. Install the solenoid retainer (2).

    13. Object Number: 1331385 Size: SH
  13. Position the control valve assembly on the work table so that main valve body (16) is facing up.

    14. Important: P/N 29541895 is printed on the pressure control solenoid 1 (PCS1).

  14. Install the solenoid O-ring (14) onto the PCS1 (15).

    15. Important: P/N 29541896 is printed on the pressure control solenoid 2 (PCS2).

  15. Install the solenoid O-ring (8) onto the PCS2 (9).
  16. Install the spring (10) , PCS1 trim valve (11), spring (12), and trim gain valve (13).
  17. Install the spring (5), PCS2 trim valve (6) and trim gain valve (7).
  18. Install PCS1 (15) so that the electrical connection faces up. Do not seat the solenoid.
  19. Install PCS2 (9) so the electrical connection faces up. Do not seat the solenoid.
  20. Align 2 accumulator plugs (3) so that the spring bores face up.
  21. Install 2 accumulator plugs (3) and 2 accumulator springs (2).
  22. Push PCS1 and PCS2 into the bores until the solenoids seat.
  23. Align the PCS retaining bracket (1) with main valve body locating pin (4).
  24. Install the PCS retaining bracket (1) so that PCS1 and PCS2, the accumulator plugs, and the accumulator springs are retained against the valve body.

    25. Object Number: 1331541 Size: SH
  25. Install 3 bolts (1) retaining the PCS retaining bracket (2).

    26. Tighten
    Tighten bolts (1) to 12 N·m (108 lb in).


    Object Number: 1331380 Size: SH

    Important: 

       • The solenoid O-rings are brown.
       • O-ring (3) is slightly larger than O-ring (2).
       • P/N 29536833 is printed on the shift solenoid 3 (SS3).

  26. Install the solenoid O-ring (3) onto the SS3 (4).
  27. Install the solenoid O-ring (2) onto the SS3 (4).
  28. Install the SS3 (4) so that the electrical connection faces up. seat the solenoid.
  29. Install the solenoid retainer (1).

    30. Object Number: 1331377 Size: SH

    Important: 

       • The solenoid O-rings are brown.
       • O-ring (3) is slightly larger than O-ring (2).
       • P/N 29536833 is printed on shift solenoid 2 (SS2).

  30. Install the solenoid O-ring (3) onto the SS2 (4).
  31. Install the solenoid O-ring (2) onto the SS2 (4).
  32. Install the SS2 (4) so that the electrical connection faces up. seat the solenoid.
  33. Install the solenoid retainer (1).

    34. Object Number: 1581001 Size: SH

    Important: 

       • P/N 29541898 is printed on the torque converter clutch pressure control solenoid (TCC PCS).
       • The solenoid O-rings are green.
       • O-ring (6) is slightly larger than O-ring (5).

  34. Install the solenoid O-ring (6) onto the TCC PCS (7).
  35. Install the solenoid O-ring (5) onto the TCC PCS (7).
  36. Install the TCC PCS spring (3).
  37. Install the TCC PCS valve (4)
  38. Align the TCC PCS (7) so that the electrical connection faces up.
  39. Install the TCC PCS. Seat the solenoid.
  40. Align the PCS retaining bracket (2) with the main valve body locating pin.
  41. Install the PCS retaining bracket (2) so that the TCC PCS is against the valve body.
  42. Install the bolt (1) retaining the PCS retaining bracket (2).

    43. Tighten
    Tighten the bolt to 12 N·m (108 lb in).


    Object Number: 1633324 Size: SH

    Important: 

       • The solenoid O-rings are brown.
       • O-ring (3) is slightly larger than O-ring (2)
       • P/N 29536833 is printed on the modulated main pressure (MAIN MOD) solenoid.

  43. Install the O-rings (3 and 4) onto the MAIN MOD solenoid (6).
  44. Install the MAIN MOD solenoid (6).
  45. Install the MAIN MOD solenoid retainer (5) into the bottom of the valve body.
  46. Install the MAIN MOD solenoid body assembly (2).

    47. Important: Four bolts pass through the MAIN MOD solenoid valve body to retain the control valve body assembly to the transmission case. Install these bolts when installing the control valve body assembly.

  47. Install the 2 bolts (1) retaining the MAIN MOD solenoid valve body and the shift valve body to the main valve body.

    48. Tighten
    Tighten bolts to 12 N·m (108 lb in).


    Object Number: 1580997 Size: SH
  48. Align the bolts holes and alignment tabs of the transmission fluid pressure (TFP) switch (1) with the TFP switch holes in main valve body (3).
  49. Install TFP switch (1) onto main valve body (3).

    50. Object Number: 1581013 Size: SH

    Important: 

       • Bolt (2) is slightly longer than the other bolts (1).
       • The TFP switch is retained by five bolts (1) and by bolt (2).

  50. Install five bolts (1) and one bolt (2) retaining the TFP switch to the main valve body.

    51. Tighten
    Tighten the bolts to 12 N·m (108 lb in).

  51. Install the reverse signal pipe (2) onto the main valve body.
  52. Install two bolts (3) retaining the reverse signal pipe and the shift valve body to the main valve body.

    53. Tighten
    Tighten the bolts to 12 N·m (108 lb in).