Here's the general procedure. Important Note: Variations exist between years and models, so double-checking with a repair manual specific to your 2001 Chevy Venture is highly recommended.
1. Disconnect the battery: This is a safety precaution to prevent accidental short circuits.
2. Raise the wiper arm: Make sure your wipers are in the "off" position. Lift the wiper arm away from the windshield. You may need to gently coax it if it's stuck.
3. Locate the wiper arm nut: This is usually a large nut or a retaining clip underneath the wiper arm. You might need a flashlight to see it clearly. It's often hidden by a plastic cap or cover.
4. Remove the nut or clip: You'll likely need a wrench (often a flat wrench or socket) to remove the nut. If it's a clip, carefully pry it open with a flat-head screwdriver or a similar tool. Sometimes the nut is difficult to access and requires significant force. If you're struggling, applying some penetrating oil (like PB Blaster) to the nut a few hours beforehand can help.
5. Remove the wiper arm: Once the nut or clip is removed, the wiper arm should come off. However, you may need to gently wiggle or twist it. It's possible some resistance remains.
6. Clean the connection point: Once the arm is removed, clean the connection point on the wiper arm and the wiper motor shaft to remove any rust or debris.
If the wiper arm is stuck:
* Penetrating oil: Spray penetrating oil on the nut and let it sit for several hours, or even overnight, to help loosen any corrosion.
* Heat: A heat gun (used carefully and briefly) can help expand the metal and break free any rust. Be extremely careful not to overheat anything plastic or damage the wiper motor.
* Wrench size: Make absolutely sure you have the correct size wrench. Using the wrong size can round off the nut and make removal even harder.
If you're uncomfortable with any of these steps, it's best to take your vehicle to a qualified mechanic. Damaging the wiper motor mechanism can be expensive to repair.
