GM Service Manual Online
For 1990-2009 cars only

    Object Number: 509617  Size: SH
  1. Use a small screwdriver in order to disconnect the electrical connectors from the following parts:
  2. • 1-2 shift solenoid valve (909)
    • 2-3 shift solenoid valve (910)
    • Transmission fluid pressure (TFP) manual valve position switch assembly (936)
    • Internal mode switch (IMS) (942)

    Object Number: 509622  Size: SH
  3. Remove the three 10 mm bolts (534) from the channel plate side.
  4. Remove the six 10 mm bolts (534, 951, 952, 954) from the accumulator housing.
  5. Important: There are four checkballs (65) and a spring (971) under the accumulator housing (944).

  6. Remove the accumulator housing (944) from the channel plate.

  7. Object Number: 509629  Size: SH
  8. Remove the four checkballs (65) and the spring (971) from the channel plate.

  9. Object Number: 509634  Size: SH
  10. Remove the six 10 mm bolts (941) from the automatic transmission fluid pressure (TFP) manual valve position switch (936).
  11. Remove the TFP manual valve position switch (936) from lower control valve body (903).

  12. Object Number: 509637  Size: SH
  13. In order to disconnect the manual valve and link assembly (916) from the internal mode switch (IMS) (942), rotate the manual valve and link assembly (916) toward the IMS (942).

  14. Object Number: 509642  Size: SH
  15. Turn the manual valve link 90 degrees and rotate the manual valve and link assembly (916) away from the IMS (942).

  16. Object Number: 509648  Size: SH
  17. Remove the three 8 mm bolts (939) from the internal mode switch (IMS) (942).
  18. Remove the IMS (942).

  19. Object Number: 509655  Size: SH
  20. Remove the nine remaining 10 mm bolts (938, 940, 941) from the lower control valve body.
  21. Remove the solenoid valve fluid filter retainer (981).
  22. Remove the lower control valve assembly (903) from the channel plate.

  23. Object Number: 509660  Size: SH
  24. Remove the four checkballs (65).
  25. Remove the spacer plate and gasket assembly (935) from the channel plate (900).