Here's a general outline of the process. Specific details may vary slightly depending on your exact Grand Am model. Consult a repair manual specific to your vehicle year and model for the most accurate instructions and diagrams. A Haynes or Chilton manual would be ideal.
1. Remove the Wiper Arms:
* Park the car on a level surface and engage the parking brake.
* Locate the wiper arm nut. This is usually a large nut underneath the wiper arm cap (sometimes a small plastic piece). You may need a special wiper arm puller tool to remove the arms without damaging them. If you don't have one, try these options:
* Using pliers: Carefully use pliers to grip the arm as close to the pivot point as possible. Gently rock and pull the arm while simultaneously loosening the nut. This method is risky, as you could damage the arm or the pivot point.
* Hammer and punch: Tap a punch or a screwdriver into the space between the wiper arm and the nut, gently leverage it and slowly loosen it. Use caution to avoid scratching the car's paint. You may have to loosen it a bit before using the hammer and punch.
* Once the nut is loose, carefully remove the wiper arm.
2. Remove the Wiper Motor and Linkage:
* Access the wiper motor and linkage. This usually involves removing the cowl (the plastic panel under the windshield). There might be clips or screws holding it in place; carefully remove them. You might need to remove the plastic trim around the base of the windshield as well.
* Disconnect the electrical connector from the wiper motor.
* Locate and disconnect the linkage. This will involve disconnecting the various rods and arms connecting the motor to the wiper arms. Take pictures or make notes as you go, as reassembly will be much easier if you know how things were connected.
* Remove the wiper motor assembly. This might involve removing a few bolts holding it to the car's body.
3. Remove the Wiper Transmission (if necessary):
Depending on what you need to repair or replace, you might need to remove the entire wiper transmission. This is usually located beneath the wiper motor and often requires disconnecting more linkage components and removing additional bolts.
Reassembly:
Follow the steps in reverse order to reassemble the wiper system. Ensure all connections are secure, and the linkage is correctly adjusted. Test the wipers thoroughly before driving.
Important Considerations:
* Rust and seized components: On older cars, parts may be rusted or seized. Penetrating oil may help loosen things up, but be patient and gentle to avoid breakage.
* Repair manual: It is highly recommended to consult a repair manual specific to your 1997 Pontiac Grand Am before beginning this repair. This will provide detailed instructions and diagrams.
* Safety: Always prioritize safety. Wear appropriate safety glasses and work gloves.
Remember, if you're not comfortable with this repair, it's best to take your car to a qualified mechanic. Attempting a repair without the proper knowledge and tools could lead to damage to your vehicle.
