GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Blazer - 4WD 🢒 Driveline/Axle 🢒 Transfer Case - NVG 236-NP8 🢒 Transfer Case Motor/Encoder Replacement

Removal Procedure

    Object Number: 707039 Size: SH
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the transfer case shield from the vehicle. Refer to Transfer Case Shield Replacement .

    3. Object Number: 662851 Size: SH
  3. Remove the motor/encoder electrical connector.

    4. Object Number: 662850 Size: SH
  4. Remove the motor/encoder mounting bolts.
  5. Remove the motor/encoder assembly.
  6. Remove the motor/encoder gasket.

Installation Procedure

    Object Number: 662850 Size: SH

    Important: When performing this service procedure, make sure that the motor/encoder unit is flat against the transfer case for proper installation.

  1. Install the motor/encoder to the transfer case.
  2. Install the motor/encoder gasket to the transfer case.

    3. 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.

  3. Install motor/encoder mounting bolts to the transfer case.

    4. Tighten
    Tighten the motor/encoder mounting bolts to 20 N·m (15 lb ft).


    Object Number: 662851 Size: SH
  4. Install the motor/encoder electrical connector.
  5. Install the transfer case shield. Refer to Transfer Case Shield Replacement .
  6. Lower the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.