GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2000 🢒 Sonoma Pickup - 4WD 🢒 Transmission/Transaxle 🢒 Manual Transmission - NV 1500 🢒 Shift Tower Replacement

Removal Procedure

    Important: 

       • Ensure that the shift lever is positioned into the mechanical third or fourth gear prior to removal of the shift housing from the transmission. The transmission must remain in this state when the shift housing is removed.
       • Do not disassemble the transmission shift housing. Internal parts for this shift housing are not available. Opening the shift housing voids the warranty.
       • When removing the shift housing from the transmission, use the exposed bolts on the base of the housing.
       • Remove the 3 console nuts and console (If equipped).

  1. Remove the shift lever. Refer to Shift Lever Replacement .

    2. Object Number: 392695 Size: SH
  2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Place a suitable jack under the transmission.
  4. If equipped with a transfer case, remove the front propeller shaft. Refer to Front Propeller Shaft Replacement in Propeller Shaft.
  5. Remove the rear propeller shaft. Refer to One-Piece Propeller Shaft Replacement or to Two-Piece Propeller Shaft Replacement in Propeller Shaft.
  6. If equipped, remove the transfer case shields.

    7. Object Number: 33202 Size: SH
  7. If equipped, remove the bolt securing the left side brace to the transmission.

    8. Object Number: 33180 Size: SH
  8. If equipped, remove the bolt and stud securing the left side brace to the transfer case.

    9. Object Number: 33134 Size: SH
  9. If equipped, remove the bolt securing the right side brace to the transmission.

    10. Object Number: 33146 Size: SH
  10. If equipped, remove the bolt securing the right side brace to the transfer case.
  11. Remove the 2 rear transmission mount nuts.
  12. Remove the 4 crossmember bolts and nuts.
  13. Remove the transfer case, if equipped. Refer to Transfer Case Replacement in Transfer Case Replacement.
  14. Lower the transmission enough to gain access to the top of the transmission.
  15. Push the insulator up towards the panel from the transmission case to gain access to the shift tower bolts.

    16. Object Number: 178851 Size: SH
  16. Remove the four bolts securing the shift housing to the transmission.
  17. Remove the shift housing.

Installation Procedure
  1. Install the shift housing to the transmission case.

    2. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 178851 Size: SH
  2. Install the four bolts securing the shift housing to the transmission.

    3. Tighten
    Tighten the shift housing bolts to 20 N·m (15 lb ft).


    Object Number: 33146 Size: SH
  3. Place the insulator back on top of the shift tower.
  4. Slightly raise the transmission.
  5. If equipped, install the transfer case. Refer to Transfer Case Replacement in Transfer Case Replacement.
  6. Install the rear transmission mount bolts.

    7. Tighten
    Tighten the bolts to 50 N·m (37 lb ft).

  7. Install the crossmember.
  8. Install the 4 crossmember bolts and nuts.

    9. Tighten
    Tighten the bolts and nuts to 50 N·m (37 lb ft).

  9. If equipped, install the right side support brace to the transfer case and the bolt.

    10. Tighten
    Tighten the bolt to 50 N·m (37 lb ft).


    Object Number: 33202 Size: SH
  10. If equipped, install the left side brace support brace to the transmission and bolt.

    11. Tighten
    Tighten the bolt to 50 N·m (37 lb ft).

  11. Install the front propeller shaft. Refer to Front Propeller Shaft Replacement in Propeller Shaft.
  12. Install the rear propeller shaft. Refer to One-Piece Propeller Shaft Replacement or to Two-Piece Propeller Shaft Replacement in Propeller Shaft.
  13. If equipped, install the transfer case shields.
  14. Remove the transmission jack.
  15. Lower the vehicle.

    16. Object Number: 392695 Size: SH
  16. Install the shift lever. Refer to Shift Lever Replacement .