Removal Procedure

WARNING: Refer to Brake Fluid Irritant Warning .

CAUTION: Refer to Brake Fluid Effects on Paint and Electrical Components Caution .

CAUTION: Always connect or disconnect the wiring harness connector from the EBCM/EBTCM with the ignition switch in the OFF position. Failure to observe this precaution could result in damage to the EBCM/EBTCM.

Place the transmission in PARK.
NOTE: The transmission must be in the PARK position, the power button in the OFF position and the brakes not applied to ensure the brake modulator and high pressure accumulator (HPA) pressure relief occurs. This process will take approximately 1 to 3 minutes.
Place the power button in the OFF position.
Remove the remote keyless entry (RKE) transmitter and close all of the vehicle doors.
Wait approximately 3 minutes for the HPA pressure relief to occur.
Remove the front suspension strut housing brace. Refer to Front Suspension Strut Housing Brace Replacement .
Disconnect the electronic brake control module (EBCM) electrical connector.
Remove the brake pressure modulator valve (BPMV) bracket bolt (1).

Fig 1: Brake Pressure Modulator Valve (BPMV) Bracket Bolt
Courtesy of GENERAL MOTORS COMPANY
Without disconnecting the connectors, remove the fasteners and position the drive motor generator power inverter module aside. Refer to Drive Motor Generator Power Inverter Module Replacement .
Remove the bolt and position aside the engine wiring junction block.
Disconnect the BPMV return hose quick connect (1).

Fig 2: BPMV Return Hose Quick Connect
Courtesy of GENERAL MOTORS COMPANY
Cap the BPMV outlet port and plug the return hose to prevent brake fluid loss and contamination.
Disconnect the BPMV supply hose quick connect (1).

Fig 3: BPMV Supply Hose Quick Connect
Courtesy of GENERAL MOTORS COMPANY
Cap the BPMV inlet port and plug the supply hose to prevent brake fluid loss and contamination.
Disconnect the right rear (1) and left rear (2) brake pipe fittings from the BPMV.

Fig 4: Right Rear And Left Rear Brake Pipe Fittings At BPMV
Courtesy of GENERAL MOTORS COMPANY

NOTE: Mark the location of the brake pipe fittings at the BPMV to ensure correct installation.
Cap the brake pipe fittings and the BPMV outlet ports to prevent brake fluid loss and contamination.
Disconnect the left front (1) and right front (2) secondary brake pipe fittings from the BPMV.

Fig 5: Left Front And Right Front Secondary Brake Pipe Fittings At BPMV
Courtesy of GENERAL MOTORS COMPANY

NOTE: Mark the location of the brake pipe fittings at the BPMV to ensure correct installation.
Cap the brake pipe fittings and the BPMV outlet ports to prevent brake fluid loss and contamination.
Disconnect the master cylinder primary brake pipe fitting (1).

Fig 6: Master Cylinder Primary Brake Pipe Fitting
Courtesy of GENERAL MOTORS COMPANY
Cap the brake pipe fitting and the BPMV inlet port to prevent brake fluid loss and contamination.
Remove the BPMV bracket nut (1).

Fig 7: BPMV Bracket Nut
Courtesy of GENERAL MOTORS COMPANY
Remove the BPMV bracket bolt (1).

Fig 8: BPMV Bracket Bolt
Courtesy of GENERAL MOTORS COMPANY
Remove the brake master cylinder. Refer to Master Cylinder Replacement .
Carefully move the front brake pipes and remove the hydraulic control unit and bracket assembly.
Remove the EBCM bolts (1).

Fig 9: EBCM And Bolts
Courtesy of GENERAL MOTORS COMPANY
Carefully separate the EBCM (1) and seal (2) from the BPMV. Do not pry or force the components apart.

Fig 10: EBCM And Seal
Courtesy of GENERAL MOTORS COMPANY

NOTE: Do not pry the EBCM from the BPMV. The EBCM must be pulled back evenly.