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 arms. Refer to Windshield Wiper Arm Replacement .
  2. Remove the air inlet grille panel. Refer to Air Inlet Grille Panel Replacement .
  3. Remove the transmission drive link from the wiper motor crank arm using the J 39232 .

  4. Object Number: 443597  Size: SH
  5. Remove the transmission screws.
  6. Remove the transmission from the vehicle through the access openings in the top of the cowl.

Installation Procedure


    Object Number: 443597  Size: SH
  1. Install the transmission to the vehicle.
  2. 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 the transmission mounting screws.
  4. Tighten
    Tighten the wiper transmission mounting screws to 8 N·m (70 lb in).


    Object Number: 429902  Size: SH

    Important: 

       • Lubricate the inside of the socket with white lithium grease (GM P/N 9985885) or equivalent.
       • The wiper transmission must be assembled to the crank arm past the second detent so the seal is compressed to a maximum height of 25.5 mm (1 in).

  5. Install the transmission drive link to the wiper motor crank arm using the J 39529 .
  6. Install the air inlet grille panel. Refer to Air Inlet Grille Panel Replacement
  7. Install the wiper arms. Refer to Windshield Wiper Arm Replacement .