why is my GMC Sierra T1XX (2019-Present) making a grinding noise when braking?

Learn how to diagnose and fix grinding noise when braking in GMC Sierra T1XX. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the battery to prevent accidental engagement of the brake system.

2. Remove Wheel

• Tools Required: Jack, jack stands, lug wrench.
• Loosen the lug nuts slightly while the vehicle is on the ground.
• Raise the vehicle using a jack and secure it with jack stands.
• Remove the lug nuts and take off the wheel to access the brake components.

3. Inspect and Replace Brake Pads

• Remove the brake caliper bolts using a socket wrench.
• Carefully lift the caliper away from the rotor and support it with a bungee cord (do not let it hang by the brake line).
• Remove the old brake pads by sliding them out of the caliper bracket.
• Inspect: Check the caliper bracket for any corrosion or debris.
• Install new brake pads, ensuring they are properly seated in the caliper bracket.

4. Inspect and Replace Brake Rotors (if needed)

• Remove the rotor by taking off any retaining screws.
• Inspect the rotor for signs of scoring or warping. Replace if necessary.
• Install new rotors, ensuring they are clean and free of oil or grease.

5. Reassemble Brake Components

• Reattach the caliper over the new brake pads and rotor.
• Tighten caliper bolts to the manufacturer’s specified torque (usually around 20-30 ft-lbs).
• Reinstall the wheel and hand-tighten the lug nuts.

6. Lower Vehicle and Final Check

• Lower the vehicle from the jack stands.
• Tighten the lug nuts to the correct torque specification (typically 80-100 ft-lbs).
• Reconnect the battery and check for any brake warning lights.