Here's a general outline of the process. This is not a comprehensive guide, and you should consult a repair manual specific to your 1997 GMC Suburban 4x4 for detailed instructions and torque specifications. These vary slightly depending on the engine and specific trim level.
Tools You'll Need:
* Jack and jack stands (Crucially important for safety)
* Lug wrench
* Wheel chocks
* Socket wrench set (metric)
* Torque wrench (essential for proper tightening)
* C-clamp or brake caliper compressor tool
* Wire brush or rotor cleaning tool
* Brake cleaner
* New rotors
* New brake pads (highly recommended to replace at the same time)
* Penetrating oil (like PB Blaster)
* Safety glasses
* Gloves
Steps:
1. Safety First: Park on a level surface, engage the parking brake, and use wheel chocks on the wheels opposite the ones you're working on. This is absolutely critical to prevent the vehicle from rolling.
2. Jack Up and Secure: Safely jack up the vehicle and securely support it with jack stands under the frame near the wheels you are working on. Never work under a vehicle supported only by a jack.
3. Remove the Wheel: Remove the lug nuts and carefully remove the wheel.
4. Remove the Caliper:
* Use a socket wrench to remove the caliper bolts. These can be stubborn; penetrating oil may help.
* Carefully remove the caliper and support it with a bungee cord or wire to prevent it from hanging by the brake line. Do not let the brake line dangle or get damaged.
5. Remove the Brake Pads: Remove the brake pads from the caliper. Take note of their orientation if you intend to reuse them (though it's generally better to replace pads when replacing rotors).
6. Remove the Rotor: Depending on your Suburban's setup, the rotor might slide off directly or it might require removing a caliper bracket or other securing mechanism. Consult your repair manual for specifics. A few taps with a rubber mallet might be needed.
7. Clean the Hub: Use a wire brush to thoroughly clean the wheel hub mounting surface. Remove any rust, debris, or old brake dust.
8. Install the New Rotor: Carefully slide the new rotor onto the wheel studs, ensuring it's properly seated.
9. Reinstall the Caliper and Pads: Install the new brake pads, carefully ensuring they're properly seated in the caliper. Reattach the caliper, making sure the caliper slides smoothly in its brackets. Tighten the caliper bolts to the manufacturer's specified torque.
10. Reinstall the Wheel: Replace the wheel and tighten the lug nuts to the manufacturer's specified torque in a star pattern (opposite nuts first, then the ones in between).
11. Repeat for Other Wheel: Repeat steps 4-10 for the other wheel on the axle. You usually need to do both wheels on the same axle at the same time to maintain even braking.
12. Lower the Vehicle: Carefully lower the vehicle.
13. Pump the Brakes: Before driving, pump the brake pedal several times to build up pressure and check for leaks.
14. Test Drive: Take a short test drive and check for any unusual noises or vibrations.
Important Considerations:
* Brake System Bleeding: In some cases, you might need to bleed the brakes after replacing rotors and pads. This is to remove any air bubbles that may have entered the brake lines during the process. If the brake pedal feels spongy after replacing the components, bleeding the brakes is necessary.
* Repair Manual: A repair manual specific to your 1997 GMC Suburban 4x4 is invaluable. It will provide detailed diagrams, torque specifications, and other important information.
* Professional Help: If you're uncomfortable with any part of this process, take your Suburban to a professional mechanic. Brake repair is crucial for safety. Don't risk it.
This is a general overview. Always prioritize safety and consult a repair manual for your specific vehicle before attempting this repair. Improperly installed brakes can be extremely dangerous.
