Tools you'll likely need:
* Flat-head screwdriver (possibly a small one): To help pry the wiper arm cap (if present).
* Wrench (likely 10mm or 13mm): To loosen the nut securing the wiper arm to the wiper transmission. Check your manual to confirm the correct size.
* Penetrating oil (like PB Blaster): Highly recommended to spray on the nut a few hours before you start to help loosen it if it's stuck.
Procedure:
1. Disconnect the Battery (Optional but Recommended): This prevents accidental short circuits if you accidentally touch the metal parts of the wiper motor during the removal.
2. Locate the Wiper Arm Nut: The nut securing the wiper arm is usually located under a plastic cap or cover on the base of the wiper arm. Sometimes this cap just pops off with gentle prying using your flathead screwdriver. Be careful not to break it.
3. Apply Penetrating Oil (Highly Recommended): Spray penetrating oil liberally onto the nut. Let it sit for at least 15-30 minutes (or even better, several hours) to help break free any corrosion.
4. Loosen the Nut: Use the appropriate size wrench to loosen and remove the nut. You may need to apply firm pressure, especially if it's rusted or seized. Turn the nut counter-clockwise to loosen it.
5. Remove the Wiper Arm: Once the nut is removed, gently wiggle and pull the wiper arm away from the wiper transmission splines. It might take some effort, but avoid using excessive force. If it's stuck, carefully try twisting the wiper arm a little. *Do not use brute force.*
6. Clean the Wiper Arm and Spline: Once the arm is removed, clean the splines on the wiper transmission to remove any debris or corrosion. This helps prevent future problems.
7. Reinstallation (Reverse of Removal): When reinstalling, make sure the arm is correctly aligned with the splines before tightening the nut. Tighten it securely, but don't overtighten.
Important Considerations:
* Mark the position of the wiper arm: Before removing the wiper arm, make a mark on the arm and the wiper transmission to help you remember its proper position for reinstalling. This is important for correct wiper operation.
* Take your time: Rushing the process can lead to damage. Patience and careful application of force are key.
* If you encounter significant resistance or are unsure about any step, it's best to seek professional assistance from a mechanic. Damaged wiper arms or transmissions can be costly to replace.
This is a general guide. Always consult your vehicle's repair manual for specific instructions and torque specifications. Your owner's manual may also have diagrams. You can often find this information online as well by searching for "[your year] Chevy S10 wiper arm removal." Remember safety first!
