GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 856630  Size: SH
  1. Remove the transfer case shield, if equipped. Refer to Transfer Case Shield Replacement .
  2. Remove the front propeller shaft. Refer to Front Propeller Shaft Replacement in Propeller Shaft.
  3. Disconnect the encoder motor electrical connector (2).

  4. Object Number: 819575  Size: SH
  5. Remove the encoder motor bolts.
  6. Remove the encoder motor.

Installation Procedure

Important: 

   • If the encoder motor is being replaced, ensure that the transfer case is in the neutral position. Manually shift the transfer case at the shift shaft, using a crescent wrench if necessary.
   • When installing the encoder motor, ensure that the encoder motor is indexed correctly and the motor is flat against the transfer case before tightening the bolts.


    Object Number: 819575  Size: SH
  1. Apply a 3.175 mm (1/8 in) bead of sealant, GM P/N 12345739, (Canadian P/N 10953541), or equivalent to the sealing surface of the encoder motor.
  2. Install the encoder motor.
  3. Rotate the shift detent lever to align to the encoder motor.

    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.

  4. Install encoder motor bolts.
  5. Tighten
    Tighten the bolts to 10 N·m (89 lb in).


    Object Number: 856630  Size: SH
  6. Connect the encoder motor electrical connector (2).
  7. Install the front propeller shaft. Refer to Front Propeller Shaft Replacement in Propeller Shaft.
  8. Install the transfer case shield, if equipped. Refer to Transfer Case Shield Replacement .