Tools You'll Need:
* A wiper arm puller: This is highly recommended to avoid damaging the wiper arm or the wiper spindle. Trying to pry it off with screwdrivers often results in damage. You can find these at most auto parts stores.
* Socket wrench or adjustable wrench (possibly): In some cases, a nut may secure the wiper arm to the spindle. This is less common but worth checking.
* New wiper arms: Make sure you purchase wiper arms specifically for a 2002 Pontiac Grand Prix.
Procedure:
1. Disconnect the battery: This is a safety precaution to prevent accidental shorts.
2. Lift the wiper arms: Raise the wiper arms away from the windshield. You may need to manually move them to their highest position.
3. Use the wiper arm puller: Position the wiper arm puller's jaws around the wiper arm base where it connects to the spindle. Tighten the puller's nut or screw gradually and firmly until the wiper arm releases from the spindle. *This is the crucial step*. If you don't have a puller, you risk damaging the spindle.
4. Inspect the Spindle: Once the arm is off, check the spindle for any damage or corrosion. Clean it if needed. There might be a small nut holding the arm on; if so, remove it before the puller.
5. Install the new wiper arm: Carefully align the new wiper arm with the spindle and push it firmly onto the spindle. If there's a nut, tighten it securely.
6. Repeat for the other arm: Follow the same procedure for the passenger-side wiper arm.
7. Reconnect the battery: Once both arms are installed, reconnect the battery.
8. Test the wipers: Turn on your wipers to ensure they operate correctly.
Important Considerations:
* Stubborn Arms: If the wiper arm is particularly stubborn, try using a lubricant (like WD-40) around the base of the arm where it connects to the spindle. Let it sit for a few minutes before attempting to remove it with the puller.
* Spindle Damage: If you manage to remove the arm without a puller, but the spindle seems damaged or bent, it might need replacement. This is a more involved repair.
* Wiper Blades: While you're at it, replace your wiper blades as well. Old blades can leave streaks and reduce visibility.
If you're uncomfortable performing this repair yourself, it's best to take your vehicle to a qualified mechanic. Improper removal can damage the wiper motor mechanism or spindle, leading to more expensive repairs.
