GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1998 🢒 Park Avenue 🢒 Body and Accessories 🢒 Body Rear End 🢒 Windshield Wiper Arm Replacement

Removal Procedure

    Object Number: 537231 Size: SH
  1. Turn the ignition switch to the ACCY position.
  2. Set the wiper switch to DELAY or AUTO DELAY position.
  3. Turn the ignition off when the wiper arms are in the innerwipe position and not moving.
  4. Disconnect the washer hose from the washer hose connector.
  5. Mark the postion of the wiper blade on the windshield with a suitable marker or masking tape.
  6. Raise the hood.
  7. Remove the cover from the nut.
  8. Remove the nut.

    9. Important: Use a battery terminal puller to remove the wiper arm if rocking the wiper arm fails to loosen it from the drive shaft.

  9. Rock the wiper arm back and forth to loosen it from the drive shaft.
  10. Remove the wiper arm from the drive shaft.
  11. Clean the drive shaft knurls with a wire brush.
  12. Remove the wiper blade from the wiper arm, if required. Refer to Windshield Wiper Blade Replacement .

Installation Procedure

    Object Number: 537231 Size: SH
  1. Install the wiper blade, if removed. Refer to Windshield Wiper Blade Replacement .
  2. Install the wiper arm onto the transmission drive shaft, with the wiper blade aligned with the mark made during removal.

    3. Important: It may be necessary to allow for some movement of a wiper arm when its nut is being tightened. If the wiper arm moves away from the desired alignment mark, loosen the nut and reposition the wiper arm.

    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 nut onto the transmission drive shaft.

    4. Tighten
    Tighten the nut to 25 N·m (18 lb ft) while holding the wiper arm.

    Important: Lubricate the washer hose with windshield washer solvent to ease installation on the washer hose connector.

  4. Install the washer hose onto the washer hose connector.
  5. Close the hood.
  6. Clean the position marks from the windshield.
  7. Run the wipers and check for proper wipe pattern.
  8. Turn off the wipers and check for the correct park position.