GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 39232 Wiper Transmission Separator
    • J 39529 Wiper Transmission Installer

Removal Procedure


    Object Number: 306506  Size: SH
  1. Remove the wiper arm and blade assemblies. Refer to Windshield Wiper Arm Replacement .
  2. Remove the air inlet grille panel. Refer to Air Inlet Grille Panel Replacement .
  3. Remove the transmission from the wiper motor drive link using the J 39232 .

  4. Object Number: 429899  Size: SH
  5. Disconnect the electrical connector from the wiper motor assembly.
  6. Remove the three screws and wiper motor assembly from the vehicle.

Installation Procedure

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.


    Object Number: 429899  Size: SH
  1. Install the wiper motor assembly onto the vehicle with three screws.
  2. Tighten
    Tighten the wiper motor assembly mounting screws to 6.5 N·m (57 lb in).

  3. Connect the electrical connector.

  4. Object Number: 429902  Size: SH

    Important: 

       • Lubricate the socket with white lithium grease (GM P/N 9985885) or equivalent.
       • The wiper transmission assembly must be assembled to the crank arm past the second detent so the seal is compressed to a maximum height of 25 mm (1 in).

  5. Install the transmission drive link socket onto the crank arm ball of the wiper motor assembly using the J 39529 .
  6. Install the air inlet grille panel. Refer to Air Inlet Grille Panel Replacement .
  7. Install the wiper arm and blade assemblies. Refer to Windshield Wiper Arm Replacement .