You need a scan tool that can access the ABS system and perform the automated bleed procedure for the ABS system. Sounds like you have air trapped in the ABS system. Conventional bleeding cannot get the air out of the system.
Roy
BLEEDING PROCEDURES
Important: Never pump the brake pedal. Fluid cavitation may occur.
NOTICE: Gravity and vacuum bleeding are not recommended for this ABS system.
Two Person Procedure (Preferred)
1. Raise the vehicle to gain access to the system bleed screws. Install clear tubing on the bleed screws so that air bubbles in the fluid can be seen.
2. Begin by bleeding the system at the right rear wheel, then the left rear, right front and left front.
3. Open one bleed screw at a time 1/2 to 1 full turn.
4. Slowly depress the brake pedal until it reaches its full travel and hold until the bleed screw has been tightened. Release the brake pedal and wait 10-15 seconds for the master cylinder to return to the home position.
Important: Repeat steps 1 through 4 until approximately 1 pint of brake fluid has been bled from each wheel. Clean brake fluid should be present at each of the wheel bleed screws. Check the master cylinder fluid level every 4 to 6 strokes of the brake pedal to avoid running the system dry.
5. If any component is replaced which may have caused air to enter the BPMV, use a Scan Tool to run "Function Test" four times while applying the brake pedal firmly.
Important: Set the park brake when running the "Function Test."
6. Rebleed all four wheels using steps 1 through 4 to remove the remaining air from the brake system.
7. Evaluate the brake pedal feel before attempting to drive the vehicle and rebleed as many times as necessary to obtain appropriate pedal feel.
Tuesday, March 16th, 2021 AT 10:10 AM
