2004 Cadillac Escalade EXT Brake Master Cylinder Bleeder Tool

You should not allow the vehicle to be driven until the concern is diagnosed and repaired.

The base hydraulic brake system must be bled before performing this automated bleeding procedure. If you have not yet performed the base hydraulic brake system bleeding procedure, refer to Hydraulic Brake System Bleeding (Manual) or Hydraulic Brake System Bleeding (Pressure) in Hydraulic Brakes before proceeding.

If the brake system warning lamp remains illuminated, you should not allow the vehicle to be driven until it is diagnosed and repaired.

You need to ensure that the master cylinder reservoir is filled to at least the minimum-fill level with Delco Supreme 11, GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT 3 brake fluid from a clean, sealed container, and that the master cylinder reservoir cap is ON securely. You also need to install a scan tool, turn ON the ignition, select the VSES Special Functions menu ore the scan tool, select Pre-charge Bleed, press the On key, evaluate the feel of the brake pedal and ensure that the master cylinder reservoir is filled to at least the minimum-fill level with Delco Supreme 11, GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT 3 brake fluid from a clean, sealed container.

Using a smooth, round-ended tool, depress and release the primary piston as far as it will travel, a depth of about 25 mm (1 inch), several times. Observe the flow of fluid coming from the ports. As air is bled from the primary and secondary pistons, the effort required to depress the primary piston will increase and the amount of travel will decrease.