Brake Pressure Modulator Valve Replacement

Fig 1: Identifying Brake Pressure Modulator Valve

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
CAUTION: Refer to Brake Fluid Irritant Caution . NOTE: Refer to Brake Fluid Effects on Paint and Electrical Components Notice . NOTE: 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. Preliminary Procedures Place the ignition switch in the OFF position. Clean the brake pipe fittings of any dirt or debris. Remove the underhood electrical center. Refer to Underhood Electrical Center or Junction Block Replacement . Place a clean cloth under the brake modulator assembly to catch any brake fluid loss.
1	Electronic Brake Control Module (EBCM) Electrical Connector Tip: Release the locking tab and rotate the electrical connector cover upward to release.
2	Master Cylinder Brake Pipe Fitting (Qty: 2) NOTE: Refer to Fastener Notice . Tip: Cap the brake pipe fittings to prevent brake fluid loss and contamination. Plug the brake modulator assembly inlet ports to prevent brake fluid loss and contamination. Tighten: 21 N.m (16 lb ft)
3	Front Brake Pipe Fitting (Qty: 2) Tip: Cap the brake pipe fittings to prevent brake fluid loss and contamination. Plug the brake modulator assembly outlet ports to prevent brake fluid loss and contamination. Tighten: 21 N.m (16 lb ft)
4	Rear Brake Pipe Fitting (Qty: 2) Tip: Cap the brake pipe fittings to prevent brake fluid loss and contamination. Plug the brake modulator assembly outlet ports to prevent brake fluid loss and contamination. Tighten: 21 N.m (16 lb ft)
5	EBCM to Brake Pressure Modulator Valve (BPMV) Screw (Qty: 4) Tip: Tighten the screws in a cross pattern. Tighten: 3 N.m (27 lb in)
6	Electronic Brake Control Module (EBCM)
7	EBCM to BPMV Seal (Qty: 12)
8	Brake Modulator Assembly Bolt Tighten: 20 N.m (15 lb ft)
9	Brake Pressure Modulator Valve Tip: Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding (Manual) or Hydraulic Brake System Bleeding (Pressure) . Turn the ignition switch to the ON position. DO NOT start the engine. Perform the Diagnostic System Check - Vehicle . Observe the feel of the brake pedal after performing the diagnostic system check. If the pedal now feels spongy, air may have been in the secondary circuit of the brake modulator assembly, which may have been introduced into the primary circuit. If the pedal feels spongy, perform the Antilock Brake System Automated Bleed Procedure .
10	Brake Modulator Assembly Insulator (Qty: 3)