GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Catera 🢒 Body and Accessories 🢒 Wipers/Washer Systems 🢒 Windshield Wiper Transmission Replacement

Removal Procedure

    Object Number: 159509 Size: SH
  1. Remove the air inlet grilles. Refer to Air Inlet Grille Panel Replacement in Body Front End.
  2. Remove air inlet grille support bracket two screws.

    3. Lift up on windshield glass seal to expose screws.

  3. Remove the power brake booster vacuum hose. Refer to Vacuum Brake Booster Hose Replacement in Hydraulic Brakes.
  4. Unclip the knock sensor and fuel injection harness from the engine lift bracket.
  5. Disconnect the wiring harness connector from the windshield wiper motor.
  6. Remove the windshield wiper transmission upper link (1) from the windshield wiper motor crank arm (6).

    7. Object Number: 159508 Size: SH
  7. Remove the windshield wiper transmission screws.
  8. Remove the windshield wiper transmission with the motor.

    9. Object Number: 159509 Size: SH
  9. Remove the wiper motor crank arm nut (7).
  10. Remove the wiper motor crank arm (6).
  11. Remove the windshield wiper transmission lower link (3) from the windshield wiper transmission (2).
  12. Remove the windshield wiper motor bracket bolts (5) from the windshield wiper transmission (2).
  13. Remove the windshield wiper motor (4) from the windshield wiper transmission (2).

Installation Procedure

    Object Number: 159509 Size: SH
  1. Install the windshield wiper motor (4) to the windshield wiper transmission (2).

    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.

  2. Install the windshield wiper motor bracket bolts (5) to the windshield wiper transmission (2).

    3. Tighten
    Tighten the wiper motor bracket bolts until fully seated but not stripped.

  3. Install the windshield wiper transmission lower link (3) to the windshield wiper transmission (2).
  4. Install the wiper motor crank arm (6).
  5. Install the wiper motor crank arm nut (7).

    6. Tighten
    Tighten the wiper motor crank arm nut until fully seated but not stripped.


    Object Number: 159508 Size: SH
  6. Install the windshield wiper transmission with the motor.
  7. Install the windshield wiper transmission screws.

    8. Tighten
    Tighten the windshield wiper transmission screws until fully seated but not stripped.


    Object Number: 159509 Size: SH
  8. Install the windshield wiper transmission upper link (1).
  9. Connect the wiring harness connector to the windshield wiper motor.
  10. Clip the knock sensor and fuel injection harness to the engine lift bracket.
  11. Install the air inlet grille support bracket.
  12. Install the air inlet grille support bracket screws.

    13. Tighten
    Tighten the air inlet support bracket screws until fully seated but not stripped.

  13. Install the power brake booster vacuum hose. Refer to Vacuum Brake Booster Hose Replacement in Hydraulic Brakes.
  14. Install the air inlet grilles. Refer to Air Inlet Grille Panel Replacement in Body Front End.