It doesn't seem like it would be all that hard to make windshield wipers that work in this day and age, but GM can't build a windshield wiper that works to save their soul. Sooner or later, they won't park in the right place. When that happens (no if, when), pull the cover off the motor and clean the contacts. It's happened to our '89, '95, '97, & 2000 vehicles. At least on the newer vehicles, you don't have to remove the wiper motor. You can fix it while still installed on the vehicle.