GM Service Manual Online
For 1990-2009 cars only

Note: NEW cooler pipe O-rings and torque converter bolts will be required each time the transmission is removed and installed.

Removal Procedure

  1. Remove the exhaust system. Refer to Exhaust Muffler with Resonator, Exhaust, and Tail Pipe Replacement
  2. Remove the catalytic converters. Refer to Catalytic Converter Replacement - Left Side and Catalytic Converter Replacement - Right Side
  3. Remove the propeller shaft. Refer to Propeller Shaft Replacement

  4. Object Number: 2182220  Size: SH
  5. Disconnect the shift linkage from the transmission.

  6. Object Number: 1983368  Size: SH
  7. Remove the transmission vent hose from the retaining clips (6) on the transmission support.

  8. Object Number: 1979767  Size: SH
  9. Disconnect the transmission wiring harness connector (4) from the transmission by releasing the locking mechanism and rotating the latch counterclockwise.
  10. Remove the wiring harness retainers (1) from the transmission.
  11. Remove the oxygen sensor wiring harness connector (2) from the transmission.
  12. Place an oil drain pan under the transmission fluid cooler pipes.

  13. Object Number: 1979765  Size: SH
  14. Remove the transmission fluid cooler pipes (1) from the transmission, and position aside.
  15. Remove and discard the O-rings. Do NOT reuse the O-rings.
  16. Plug the open outlet ports to prevent fluid loss and contamination.

  17. Object Number: 1983699  Size: SH
  18. Remove the transmission close out plug (1).
  19. Mark the torque converter to flexplate/flywheel orientation to ensure proper realignment.
  20. Remove the starter motor. Refer to Starter Replacement

  21. Object Number: 1979764  Size: SH
  22. Repeat the following steps for all torque converter bolts (1):
  23. 16.1. Rotate the harmonic balancer center bolt clockwise ONLY, in order to align the torque converter bolt with the access hole.
    16.2. Remove and discard the torque converter bolts.
  24. Support the transmission with a suitable transmission jack.
  25. Remove the transmission support. Refer to Transmission Mount Replacement
  26. Slightly lower the transmission to gain access to the upper transmission retaining bolts.

  27. Object Number: 1983368  Size: SH
  28. Disconnect the transmission vent hose (4) from the transmission vent pipe (1).

  29. Object Number: 1979766  Size: SH
  30. Remove the wiring harness retainers (2) from the transmission.
  31. Position the transmission wiring harness (1) and vent tube out of the way.

  32. Object Number: 1979763  Size: SH
  33. Remove the transmission mounting bolts (1-6).
  34. Remove the remaining transmission bolts from the transmission.
  35. Pull the transmission free from the engine dowels.
  36. Note: Ensure clearance is maintained between the transmission and the following:

       • The wiring harness
       • The vent tube
       • The cooler pipes

  37. Carefully lower the transmission from the vehicle.
  38. Flush the transmission oil cooler if necessary.

Installation Procedure

    Note: Ensure clearance is maintained between the transmission and the following:

       • The wiring harness
       • The vent tube
       • The cooler pipes

  1. Using the transmission jack, carefully raise the transmission to the engine.

  2. Object Number: 1644591  Size: SH
  3. Align the transmission with the engine dowels.
  4. Caution: Refer to Fastener Caution in the Preface section.

  5. Install the transmission mounting bolts and tighten to 50 N·m (37 lb ft).

  6. Object Number: 1979766  Size: SH
  7. Position the engine wiring harness (1) to the original location.
  8. Install the wiring harness retainers (2) to the transmission.

  9. Object Number: 1983368  Size: SH
  10. Connect the transmission vent hose (4) to the transmission vent pipe (1).
  11. Raise the transmission to the installed position.
  12. Install the transmission support. Refer to Transmission Mount Replacement
  13. Remove the jack from under the transmission.
  14. Align the torque converter to flexplate/flywheel orientation marks made during the removal procedure.

  15. Object Number: 1979764  Size: SH

    Note: Torque converter bolts are self locking and must be replaced with NEW torque converter bolts every time the bolts are removed.

  16. Complete the following steps for all torque converter bolts (1):
  17. 11.1. Rotate the harmonic balancer center bolt clockwise ONLY, in order to align the torque converter bolt holes in the flexplate/flywheel with the access hole in the engine block.
    11.2. To aid in alignment of the torque converter to the flexplate/flywheel. Install all NEW torque converter bolts before fully tightening to 65 N·m (48 lb ft).
  18. Install the starter motor. Refer to Starter Replacement

  19. Object Number: 1983699  Size: SH
  20. Install the transmission close out plug (1).

  21. Object Number: 1979765  Size: SH
  22. Place NEW O-rings over the transmission fluid cooler pipes.
  23. Install the transmission fluid cooler pipes (1) to the transmission.

  24. Object Number: 1979767  Size: SH
  25. Install the oxygen sensor wiring harness connector (2) to the transmission.
  26. Install the wiring harness retainers (1) to the transmission.
  27. Connect the transmission wiring harness connector (5) to the transmission by rotating the locking latch clockwise.

  28. Object Number: 1983368  Size: SH
  29. Install the transmission vent hose to the retaining clips (6) on the transmission support.

  30. Object Number: 2182220  Size: SH
  31. Install the shift linkage to the transmission. Refer to Shift Control Linkage Replacement
  32. Install the propeller shaft. Refer to Propeller Shaft Replacement
  33. Install the catalytic converters. Refer to Catalytic Converter Replacement - Left Side and Catalytic Converter Replacement - Right Side
  34. Install the exhaust system. Refer to Exhaust Muffler with Resonator, Exhaust, and Tail Pipe Replacement
  35. Lower the vehicle.
  36. Check the transmission fluid level and fill if necessary.
  37. Adjust the shift control linkage. Refer to Shift Control Linkage Adjustment

Transmission Final Test and Inspection

Complete the following procedure after the transmission is installed in the vehicle:

  1. With the ignition OFF or disconnected, crank the engine several times. Listen for any unusual noises or evidence that any parts are binding.
  2. Start the engine and listen for abnormal conditions.
  3. While the engine continues to idle, raise and support the vehicle.
  4. Inspect for fluid leaks while the engine is idling.
  5. Perform a final inspection for the proper fluid level.
  6. Lower the vehicle.
  7. Calibrate the transmission control module (TCM).
  8. Note: It is recommended that transmission adaptive pressure (TAP) information be reset.

    Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, The ECM, PCM or TCM will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned.

  9. Reset the TAP values. Refer to Service Fast Learn Adapts
  10. Road test the vehicle. Refer to Road Test