Tools You'll Need:
* Jack and jack stands: Absolutely crucial for safety. Never work under a vehicle supported only by a jack.
* Wheel chocks: To prevent the vehicle from rolling.
* Lug wrench: To remove the wheels.
* Socket wrench and sockets: Various sizes, likely including 13mm, 15mm, and possibly others depending on your specific Suburban.
* C-clamp or brake caliper compressor tool: To compress the caliper piston. A C-clamp works, but a dedicated tool is easier and less likely to damage the caliper.
* Wrench or socket to remove caliper mounting bolts.
* Penetrating oil (PB Blaster or similar): To help loosen any rusted bolts.
* Brake cleaner: To clean brake parts.
* New front brake pads: Make sure you get the correct pads for your specific Suburban model.
* Gloves: To keep your hands clean.
* Safety glasses: To protect your eyes.
* Torque wrench (optional but highly recommended): To tighten bolts to the manufacturer's specifications.
Procedure:
1. Safety First: Park on a level surface, engage the parking brake, and chock the rear wheels. Use jack stands to securely lift the front of the Suburban.
2. Remove the Wheel: Remove the lug nuts and take off the wheel.
3. Locate the Caliper: The brake caliper is the large metal assembly holding the brake pads.
4. Remove the Caliper: There are typically two bolts holding the caliper to the knuckle. Spray penetrating oil on the bolts beforehand, let it sit for a few minutes, and then carefully remove the bolts. Support the caliper with a wire or bungee cord to prevent the brake line from stressing or the caliper from hanging by the brake line.
5. Compress the Caliper Piston: Use the C-clamp or caliper compressor tool to push the caliper piston back into the caliper bore. This creates space for the new, thicker brake pads. You may need to turn the piston slowly as you compress it to allow it to retract smoothly. Some brake fluid will likely be expelled, so have a rag ready to catch it.
6. Remove Old Brake Pads: The old brake pads should now be easily removable. If they're stuck, gently pry them out.
7. Inspect the Rotors: Carefully inspect the brake rotors for excessive wear, scoring, or damage. If they need replacing, do so now.
8. Install New Brake Pads: Insert the new brake pads into their respective slots on the caliper.
9. Reinstall the Caliper: Carefully mount the caliper back onto the knuckle and tighten the bolts to the manufacturer's torque specifications (consult your repair manual).
10. Reinstall the Wheel: Mount the wheel back on and tighten the lug nuts. Don't overtighten them yet.
11. Lower the Vehicle: Carefully lower the vehicle using the jack stands.
12. Final Tightening: Tighten the lug nuts to the proper torque specification (consult your repair manual).
13. Pump the Brakes: Get back in the vehicle and pump the brake pedal several times to ensure the pads are properly engaged.
14. Test Drive: Take a short test drive to verify the brakes are working correctly.
Important Considerations:
* Consult a Repair Manual: A repair manual specific to your 1994 GMC Suburban is highly recommended. It will provide detailed diagrams, torque specifications, and other essential information.
* Brake Fluid: If you have to significantly compress the piston, you might consider bleeding the brakes afterward to remove any air that might have entered the system.
* Rotor Condition: If the rotors are excessively worn or damaged, they will need to be replaced or resurfaced.
* Wear Indicators: Pay attention to the wear indicators on your brake pads. These will let you know when they're getting low and need replacing.
This is a general guide. Specific procedures may vary slightly depending on your exact Suburban model. Always prioritize safety and consult a repair manual for precise instructions. If you are uncomfortable with any part of this process, it's best to have a qualified mechanic perform the brake service.
