Removal Procedure

WARNING: This page is about a different car, the 2008 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Refer to Brake Fluid Irritant Caution .

NOTE: Refer to Brake Fluid Effects on Paint and Electrical Components Notice .

NOTE: To prevent equipment damage, never connect or disconnect the wiring harness connection from the EBCM with the ignition switch in the ON position.

IMPORTANT:

The ignition switch must be placed in the OFF mode ONLY, before disconnecting the negative battery cable during this procedure. If the ignition switch is accidentally placed into ignition ON engine OFF mode, the control modules will be activated and disconnecting the negative cable will cause various DTCs to be set. Refer to Keyless Entry System Description and Operation .
After the ignition switch is placed into OFF mode, a waiting period of 2 minutes must be observed to allow the high-speed LAN control modules to deactivate before disconnecting or connecting the negative battery cable during this procedure. If the waiting period is not observed, one or more of these control modules may still be activated, causing various DTCs to be set.

Fig 1: Removing/Installing BPMV Inlet Brake Pipe Fittings

Courtesy of GENERAL MOTORS CORP.

Place the ignition switch into OFF mode. DO NOT place the ignition switch into ignition ON engine OFF mode.
Wait a minimum of 2 minutes to allow the high-speed LAN control modules to deactivate.
Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
Thoroughly clean the area around the EBCM of all dirt and debris.
Disconnect the secondary brake pressure modulator valve (BPMV) inlet brake pipe fitting (1).
Cap the brake pipe fitting and plug the BPMV inlet port to prevent brake fluid loss and contamination.
Disconnect the primary BPMV inlet brake pipe fitting (2).
Cap the brake pipe fitting and plug the BPMV inlet port to prevent brake fluid loss and contamination.
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
Remove the front air deflector shield. Refer to Front Air Deflector Replacement .
Remove the washer solvent container fasteners and position the washer solvent container aside to access the electronic brake control module (EBCM). Refer to Windshield Washer Solvent Container Replacement (w/CE4) or Windshield Washer Solvent Container Replacement (w/o CE4) .

Fig 2: Removing/Installing LF & RR Brake Pipe Fittings

Courtesy of GENERAL MOTORS CORP.

Disconnect the LF brake pipe fitting (1).
Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.
Disconnect the RR brake pipe fitting (2).
Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.
Disconnect the brake fluid pressure sensor electrical connector.

Fig 3: Removing/Installing LR & RF Brake Pipe Fittings

Courtesy of GENERAL MOTORS CORP.

Disconnect the LR brake pipe fitting (1).
Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.
Disconnect the RF brake pipe fitting (2).
Cap the brake pipe fitting and plug the BPMV outlet port to prevent brake fluid loss and contamination.

Fig 4: Identifying BPMV Nuts

Courtesy of GENERAL MOTORS CORP.

Remove the BPMV nuts (1) and the BPMV assembly.
Release the EBCM electrical connector by pressing the retaining tab and rotating the locking lever forward.
Inspect the BPMV insulators and replace if missing or damaged.