Sierra Classic 2500 4WD V8-6.0L (2007)
Wiper Blade: Testing and Inspection
WIPER BLADE ELEMENT CHECK
1. Remove the wiper blades from the wiper arms.
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.
4. Install the wiper blades on the wiper arms.