GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2000 🢒 Sonoma Pickup - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L60-E 🢒 Transmission Replacement

Removal Procedure
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle
  2. Remove the filler tube from the transmission. Refer to Shift Cable Replacement
  3. Plug the filler tube opening in the transmission.
  4. Remove the exhaust manifold pipe. Refer to Exhaust Manifold Replacement
  5. Remove the shift cable from the transmission. Refer Shift Cable Replacement
  6. Remove the rear propeller shaft. Refer to One-Piece Propeller Shaft Replacement or to Two-Piece Propeller Shaft Replacement in Propeller Shaft.
  7. If the vehicle is equipped with a transfer case, remove the front propeller shaft. Refer to Front Propeller Shaft Replacement
  8. If the vehicle is equipped with a transfer case, remove the transfer case. Refer to Transfer Case Replacement or Transfer Case Replacement or Transfer Case Replacement .
  9. Remove the oil cooler lines. Refer to Oil Cooler Hose/Pipe Replacement
  10. Plug the transmission oil cooler line connectors in the transmission case.
  11. Disconnect the wiring harness connectors from the transmission speed sensor and park neutral position switch.
  12. Remove the torque converter bolts. Refer to Flywheel to Torque Converter Bolt Replacement

    13. Object Number: 9098 Size: SH
  13. Nut and washer securing the transmission mount to the cross member.
  14. Remove the two bolts and washers securing the mount to the transmission.
  15. Support the transmission with a transmission jack.

    16. Object Number: 449290 Size: SH
  16. Remove the bolts and screws securing the converter cover to the transmission.

    17. Object Number: 32774 Size: SH
  17. Remove the bolts securing the transmission to the engine.
  18. Install J 21336 to the converter housing to secure the torque converter

    19. Important: J  21336 prevents the torque converter from pulling forward and dropping out of the transmission during engine and transmission separation.

  19. Pull the transmission straight back from the engine.
  20. Lower the transmission using the transmission jack.
  21. Flush the transmission oil cooler and lines. Refer to Transmission Fluid Cooler Flushing and Flow Test .

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 449290 Size: SH
  1. Install the bolts and screws securing the converter cover to the transmission.

    2. Tighten
    Tighten transmission to engine bolts to 47 N·m (35 lb ft).

  2. Ensure the torque converter is seated properly and that J 21366 is installed.

    3. Object Number: 32774 Size: SH
  3. Raise the transmission into place and remove J  21366.

    4. Support the transmission with a transmission jack.

  4. Slide the transmission straight onto the locating pins while lining up the marks on the flywheel and the torque converter.
  5. Install the bolts securing the transmission to the engine.

    6. Tighten
    Tighten transmission to engine bolts to 47 N·m (35 lb ft).


    Object Number: 9098 Size: SH
  6. Install the nut and washer securing the transmission mount to the cross member.

    7. Tighten
    Tighten the bolts to 52 N·m (38 lb ft).

  7. Install the torque converter bolts. Refer to Flywheel to Torque Converter Bolt Replacement
  8. Connect the wiring harness connectors to the transmission speed sensor and park neutral position switch.
  9. Unplug the transmission oil cooler line connectors in the transmission case.
  10. Install the oil cooler lines. Refer to Oil Cooler Hose/Pipe Replacement
  11. If the vehicle is equipped with a transfer case, install the transfer case. Refer to Transfer Case Replacement or Transfer Case Replacement or Transfer Case Replacement .
  12. If the vehicle is equipped with a transfer case, install the front propeller shaft. Refer to Front Propeller Shaft Replacement
  13. install the rear propeller shaft. Refer to One-Piece Propeller Shaft Replacement or to Two-Piece Propeller Shaft Replacement in Propeller Shaft.
  14. Install the shift cable to the transmission. Refer Filler Tube Replacement
  15. Install the exhaust manifold pipe. Refer to Exhaust Manifold Replacement .
  16. Unplug the filler tube opening in the transmission.
  17. Install the filler tube to the transmission. Refer to Filler Tube Replacement
  18. Fill the transmission to the proper level with transmission oil. Refer to Transmission Fluid Check
  19. Lower the vehicle.
  20. Test the transmission for proper operation.

    21. Important: It is recommended that the 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 the TAP values. Transmission performance may be affected as new TAP values are learned,

  21. Reset the TAP values. Refer to Adapt Function .