GM 89047744
Brake Pads

Building blocks for Brake Pad replacement on the cts-v start with checking brake master cylinder fluid level. Reduce the fluid if it stands above half way on the visible markings. Position the car on jack stands before tooking off the tire and wheel parts. Put the upper end of your Brake Pad retainer in place while hitting the caliper guide pin with a hammer and punch until it leaves the caliper. Pull out the Brake Pad retainer by swinging it toward the top. Push the Brake Pad mounting end of the upper caliper to disengage it from the mounting pin structure. Press the tool between rotor and Brake Pad with a flat plastic trim tool until all inner caliper pistons fully engage. Repeat this process for both brake pads. Take off the brake pads from their position in the caliper. Check the brake caliper guide pins for damage and corrosion then replace them. Also examine the Brake Caliper Piston boot for damage and replace it if needed. Put new brake pads (Brake Pads) in the caliper first followed by using a hammer with a punch to install the upper caliper guide pin (Caliper Guide Pin) through the caliper and pads until it sets in place. Put the Brake Pad retainer beneath the upper caliper pin components before rotating it down to push the lower end of the retainer with force. Press the new lower caliper guide pin (Caliper Guide Pin) through the brake assembly and pad pieces to fully seat it. Set the wheel tire in place and lower the vehicle. With the engine turned off apply the brake pedal one-third of its total range before releasing it slowly. Press the brake pedal for 15 seconds before repeating this step until you reach a solid brake feel which positions the brake pistons and pads correctly. Complete the brake system by putting fluid into the reservoir then working the brakes to refine pad and rotor performance.

Before replacing the j56 front brake pads check the brake master cylinder reservoir fluid level. Drain fluid when the level is above half way between the maximum-full and minimum marks. Place the vehicle on a lift and take out the tire setup when the vehicle rests on supports. Push the retainer down from the lower side and hit the lower caliper guide pin through with a hammer and punch tool to push it into the caliper. Rotate the retainer to free the Brake Pad holder. The brake caliper mounting pin in its upper position must be tapped into the caliper assembly. A plastic flat-bladed trim tool should be used to push caliper pistons into caliper piston bores through the rotor and both brake pads. One stroke of equal pressure should fully compress each piston before repeating for the opposite side. Take brake pads out from their position inside the caliper. When checking the brake caliper guide pins examine damage or corrosion and check the Brake Caliper Piston boot for issues requiring replacement. Place new brake pads inside the caliper and pass the upper caliper guide pin through all components. Hit the pin gently with a hammer and punch tool to complete installation. Position the Brake Pad retainer under the top caliper pin part and turn it downward before pushing the lower end firmly. Hit the caliper guide pin lower end through the caliper and pads until it reaches the Brake Pad retainer. Make sure the retainer rests in the center of the arrangement. Reinstall the tire and wheel assembly. Lower the vehicle. Then apply the brake pedal by hand while keeping the engine off until it reaches one-third its travel length before releasing it slowly. Press the brake pedal 15 seconds at a time until the brake pedal feels firm to make sure brake caliper pistons and pads stay correctly in position. As the last step add fluid to the master cylinder until the level matches specifications before running the wheel-brake system to smooth out the brake components.

Inspect the fluid level in the brake master cylinder reservoir.

Fill the brake master cylinder reservoir to the proper level and burnish the pads and rotors.

Clean the threads of the lower caliper pin bolt and bracket holes with denatured alcohol, and apply threadlocker GM 12345493 to two-thirds of the bolt's threaded length.

Inspect the fluid level in the brake master cylinder reservoir.

Pivot the caliper downward over the pads, ensuring the lower caliper pin bolt threads are clean before applying thread-locker GM P/N 12345493 (Canadian P/N 10953488) to two-thirds of its length.

Release the electronic park brake cable tension.

Install the brake pad retainer under the upper caliper pin assembly, rotate it down, and apply pressure downward on the lower end of the retainer.

Apply high-temperature silicone lube to the front brake caliper guide pin, install the lower brake caliper pin bolt, and tighten it to 60 Nm (44 ft. lbs.).

Check the brake caliper guide pin bolts and pins for damage or corrosion, replacing them if necessary, and inspect the guide pin seals and piston boot for deterioration.

Inspect the brake caliper guide pins and replace if damaged or corroded, and check the brake caliper piston boot for damage, replacing if necessary.

Fill the brake master cylinder reservoir to the proper level and burnish the pads and rotors.

Install the brake pad retainer under the upper caliper pin assembly, rotate it down, and apply pressure downward on the lower end of the retainer.

Drive out the upper brake caliper pin and remove the outer and inner brake pads, noting the location of the brake pad wear sensor.