Here's a general overview. Specific steps might vary slightly depending on your Grand Am's trim level and options. Always consult a repair manual specific to your vehicle year and model for detailed instructions and diagrams. A Haynes or Chilton manual is a good investment.
Tools You'll Need:
* Jack and jack stands: Essential for safety. Never work under a car supported only by a jack.
* Wheel chocks: To prevent the car from rolling.
* Lug wrench: To remove the wheels.
* Socket wrench set: Including metric sockets (likely 13mm, 14mm, and possibly others).
* Wrench set: Open-end and/or combination wrenches may be necessary.
* C-clamp or caliper compression tool: To compress the caliper piston.
* Brake cleaner: To clean brake components.
* Penetrating oil (like PB Blaster): To help loosen rusted bolts.
* New brake pads: Make sure you get the correct pads for your Grand Am.
* New rotors (optional): If the rotors are scored or worn below the minimum thickness, you'll need to replace them.
* Torque wrench: To tighten bolts to the manufacturer's specifications (crucial for safety).
* Gloves: To protect your hands.
* Safety glasses: To protect your eyes.
Steps (General Outline):
1. Safety First: Park on a level surface, engage the parking brake, and use wheel chocks.
2. Raise and Secure the Vehicle: Use the jack to lift the front of the car, placing jack stands securely under the frame near the jacking points.
3. Remove the Wheel: Remove the lug nuts and carefully take off the wheel.
4. Remove the Caliper:
* Depending on your Grand Am, you might need to remove a caliper bracket bolt or pin first. This is where a repair manual is invaluable.
* Once the caliper is loose, carefully hang it from the suspension using some wire or a bungee cord. Don't let the caliper hang by the brake line.
5. Compress the Caliper Piston: Use a C-clamp or caliper compression tool to push the caliper piston back into the caliper. This creates space for the new, thicker brake pads.
6. Remove the Old Brake Pads: The old pads should slide out easily.
7. Inspect the Rotors: Check the rotors for scoring, grooves, or excessive wear. If necessary, replace them.
8. Install the New Brake Pads: Slide the new brake pads into place.
9. Reinstall the Caliper: Carefully mount the caliper back onto its bracket and secure it with the bolts.
10. Reinstall the Wheel: Carefully mount the wheel and tighten the lug nuts. Do not overtighten.
11. Lower the Vehicle: Carefully lower the vehicle using the jack.
12. Torque Lug Nuts: Use the torque wrench to tighten the lug nuts to the manufacturer's specifications (found in your repair manual).
13. Pump the Brakes: Get back in the car and pump the brake pedal several times to engage the new pads.
14. Test Drive: Take a short test drive to ensure the brakes are working properly.
Important Considerations:
* Bleeding the Brakes: It's *unlikely* you'll need to bleed the brakes after just replacing the pads, but if you're unsure, consult your repair manual. If you do have to bleed the brakes, it's best to have a helper.
* Rotor Replacement: If you replace the rotors, make sure they are properly cleaned and any protective coating is removed before installation.
* Brake Fluid: Check your brake fluid level before and after the job. Top it off if necessary, but avoid overfilling.
This is a simplified guide. Again, consult a repair manual specific to your 1999 Pontiac Grand Am for detailed, illustrated instructions and safety precautions. Incorrect installation can lead to brake failure, which is incredibly dangerous. If you're at all hesitant, have a qualified mechanic perform the repair.
