Replacement modulators are shipped already filled and bled. In normal procedures requiring removal of the modulator, such as to replace the electronic brake control module (EBCM), air will not enter the modulator, and normal bleeding will be all that is needed.

If air enters the hydraulic modulator, or if an unfilled modulator is installed, use the brake bleeding program in the scan tool to bleed the modulator. Manual bleeding of the hydraulic modulator is not possible.

Warning: Refer to Brake Fluid Irritant Warning in the Preface section.

Caution: Avoid spilling brake fluid onto painted surfaces, electrical connections, wiring, or cables. Brake fluid will damage painted surfaces and cause corrosion to electrical components. If any brake fluid comes in contact with painted surfaces, immediately flush the area with water. If any brake fluid comes in contact with electrical connections, wiring, or cables, use a clean shop cloth to wipe away the fluid.

Note: The bleeding sequence is as follows: right rear, left rear, right front, and left front.

Note: Inspect the fluid level and add the fluid during the bleeding operation.

1. Raise the vehicle.



2. Remove the bleeder screw and cap.



3. Attach a transparent tube over the valve. Allow the tube to hang submerged in brake fluid in a transparent container.
4. Slowly push the brake pedal several times and hold the brake pedal.
5. Tighten the bleeder screw after loosening the bleeder screw and draining the fluid.

Note: Hold the brake pedal until tightening the bleeder screw.

6. Repeat steps 4 and 5 until all the air is removed.
7. Inspect the leaks for the bleeder screw.