Tools You'll Need:
* Jack and Jack Stands: Absolutely essential for safety. Never work under a vehicle supported only by a jack.
* Wheel Chocks: Place these behind the rear wheels for extra safety.
* Lug Wrench: To remove the wheel.
* Socket Wrench Set: Various sizes, including metric.
* C-clamp or Brake Caliper Compression Tool: To compress the caliper piston. A C-clamp works, but a dedicated tool is safer and easier.
* Wrench or Socket to remove Caliper Mounting Bolts: Size will depend on your vehicle. Consult your repair manual.
* Penetrating Oil (PB Blaster, etc.): Helps loosen rusted bolts.
* New Brake Pads: Make sure you get the correct pads for your Suburban.
* Gloves: To protect your hands from grease and dirt.
* Safety Glasses: Protect your eyes from debris.
* Wrench for Bleeder Screw (optional): If you plan on bleeding the brakes afterward (recommended).
Steps:
1. Safety First: Park on a level surface, engage the parking brake, and chock the rear wheels.
2. Jack Up the Vehicle: Use the jack points specified in your owner's manual to lift the front of the Suburban. Securely place jack stands under the frame near the front suspension.
3. Remove the Wheel: Loosen the lug nuts before jacking up the vehicle. Then, remove the wheel and set it aside.
4. Expose the Caliper: You should now see the brake caliper clamped around the rotor.
5. Compress the Caliper Piston: This is crucial. Use the C-clamp or compression tool to slowly and evenly push the piston back into the caliper. Be careful not to damage the piston seal. You may need to turn the piston as you compress it.
6. Remove the Caliper Mounting Bolts: Use the appropriate wrench or socket to remove the bolts holding the caliper to the caliper bracket. Apply penetrating oil if the bolts are stuck. Carefully remove the caliper and support it with something (a bungee cord or wire hooked to the suspension is a good option) to avoid stressing the brake hose.
7. Remove the Old Brake Pads: The old brake pads should now be easily accessible. You may need to use a flathead screwdriver or similar tool to gently pry them out.
8. Install the New Brake Pads: Carefully install the new brake pads into the caliper bracket. Ensure they slide smoothly.
9. Reinstall the Caliper: Carefully reattach the caliper to the bracket using the mounting bolts. Tighten them to the specified torque (consult your repair manual).
10. Reinstall the Wheel: Replace the wheel and tighten the lug nuts in a star pattern to ensure even pressure. Do not overtighten!
11. Lower the Vehicle: Carefully lower the vehicle using the jack.
12. Test and Bleed (Optional): Pump the brake pedal several times to ensure the pads are engaging properly. It's highly recommended to bleed the brakes afterward to remove any air that may have entered the system during the process. This is best done with a helper.
Important Considerations:
* Rotor Inspection: Inspect the rotors for wear and tear. If they are excessively worn, scored, or warped, they'll need to be replaced or resurfaced.
* Caliper Inspection: Check the caliper for any signs of damage or leaks. If you find any issues, it may be time to replace it.
* Repair Manual: A repair manual specific to your 1999 GMC Suburban is invaluable. It will provide detailed diagrams, torque specifications, and other crucial information.
This is a general guide. Consult your vehicle's repair manual for specific instructions and torque specifications. Remember, brake work is serious business. If you're not comfortable performing this repair, take your Suburban to a qualified mechanic. Improperly installed brakes can lead to serious accidents.
