Tools You'll Likely Need:
* Wiper arm puller: This specialized tool is highly recommended and makes the job much easier and safer. It prevents damage to the wiper arm and the wiper transmission.
* Flathead screwdriver (or similar prying tool): *Only use this if you absolutely cannot obtain a wiper arm puller, and proceed with extreme caution.*
* Penetrating oil (like PB Blaster): To help loosen any corrosion.
* Shop towels or rags: To clean up any debris.
Steps (Using a Wiper Arm Puller):
1. Prepare: Park your vehicle on a level surface. Turn off the ignition and engage the parking brake. Locate the nut securing the wiper arm to the wiper transmission splined shaft. *Do not attempt to remove the nut yet.*
2. Apply Penetrating Oil (Optional but Recommended): Spray penetrating oil onto the nut and the area where the wiper arm connects to the shaft. Let it sit for a few minutes to help loosen any rust or corrosion.
3. Position the Wiper Arm Puller: Attach the wiper arm puller according to its instructions. The puller claws usually hook around the wiper arm. Ensure it's securely attached.
4. Turn the Puller: Carefully turn the puller's adjusting screw. This will gradually apply pressure, separating the wiper arm from the transmission. You should feel resistance; do not force it.
5. Remove the Wiper Arm: Once the wiper arm is loosened, carefully pull it off the shaft.
6. Remove the Nut: Once the arm is off, remove the nut that holds the wiper arm to the splined shaft.
Steps (Using a Flathead Screwdriver - NOT RECOMMENDED):
*This method is significantly riskier and can easily damage parts. Only attempt this as a last resort and proceed with extreme caution.*
1. Prepare: Follow steps 1 and 2 above.
2. Position the Screwdriver: Place the flathead screwdriver between the wiper arm and the windshield wiper transmission.
3. Pry Gently: Very carefully and gradually pry the wiper arm away from the transmission shaft. Use a protective rag or towel to prevent scratching the windshield. Apply leverage *away* from the windshield.
4. Remove the Wiper Arm & Nut: Once loosened, carefully remove the wiper arm and the retaining nut (as in steps 5 & 6 above).
Important Considerations:
* Wiper Arm Position: The ideal position to remove the wiper arm is when it's roughly at the midpoint of its wiping arc. This often provides the best leverage.
* Force: Never use excessive force. If the wiper arm is stuck, reapply penetrating oil and try again. If it still won't budge, seek professional help.
* Reinstallation: Reinstallation is the reverse of removal. Make sure the wiper arm is correctly seated on the splined shaft before tightening the nut.
Again, consulting a repair manual specific to your 2001 Chevy S10 Blazer 4x4 is strongly advised. This will provide detailed illustrations and any model-specific nuances. If you're unsure about any part of this process, it's always best to have a qualified mechanic perform the task.
