GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 Envoy - 4WD 🢒 Body and Accessories 🢒 Wipers/Washer Systems 🢒 Wiper Arm Tip Pressure Check, Blade Element Check

Wiper Arm Pressure Check

    Object Number: 415980 Size: SH
  1. Run the wiper arms to the mid-wipe position.
  2. Remove the wiper blades from the wiper arms. Refer to Windshield Wiper Blade Replacement .
  3. Attach a scale to the end of the wiper arm and measure the force required to lift the wiper arm perpendicular to the windshield to the normal working height (the height with the blade attached).
  4. Replace the wiper arms if the measurement is not within the specified values.

    5. Tip Pressure
    7.8-9.5 Newtons (28-34 Ounces)

Blade Element Set Check

    Object Number: 334256 Size: SH
  1. Remove the wiper blades from the wiper arms. Refer to Windshield Wiper Blade Replacement .
  2. Look down the length of the blade element.
  3. Replace the wiper blade element if the rubber element which contacts the glass is not on the centerline of the blade +/-15 degrees. Refer to Wiper Blade Element Replacement .
  4. Install the wiper blades on the wiper arms. Refer to Windshield Wiper Blade Replacement .