GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 Jimmy - 2WD 🢒 Transmission/Transaxle 🢒 Manual Transmission - NV 3500 🢒 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.

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

    2. Object Number: 178851 Size: SH
  2. Remove the four bolts securing the shift housing to the transmission.
  3. Remove the insulator from the transmission case.

Installation Procedure
  1. Install the insulator to the transmission case.

    2. Object Number: 178851 Size: SH

    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.

  2. Install the four bolts securing the shift housing to the transmission.

    3. Tighten
    Tighten the shift housing bolts to 12 N·m (106 lb in).

  3. Install the shift lever. Refer to Shift Lever Replacement .