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Home >> GMC >> 2007 >> Acadia SLT, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 523 (Anti-Lock Brake System, Traction Control System & Stability Control System) >> Repair Instructions >> Brake Pressure Modulator Valve Replacement >> Installation Procedure
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Installation Procedure

WARNING: This page is about a different car, the 2007 Pontiac G6. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: When installing a new brake modulator assembly, do NOT remove the shipping plugs from the pipe ports until after installation into the vehicle.
  1. Install the brake modulator valve to the modulator bracket.
    2. Fig 1: View Brake Pressure Modulator Valve (BPMV) Bracket Components
    GM1234794Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  2. Install the 4 brake pressure modulator valve bracket insulator bolts.

    Tighten:  Tighten the bolts to 10 N.m (86 lb in).

    3. Fig 2: View Of 4 Brake Pipes At Brake Pressure Modulator Valve (BPMV)
    GM1234780Courtesy of GENERAL MOTORS CORP.
  3. Remove the caps from the master cylinder brake pipe ends.
  4. Connect the master cylinder brake pipes (1) to the modulator assembly, in the same location as removed.
  5. Remove the caps from the caliper and wheel cylinder brake pipe ends.
  6. Remove the plugs from the caliper and wheel cylinder ports on the modulator assembly.
  7. Connect the 4 brake pipes (2) to the modulator valve, in the same location as removed.
  8. Tighten all the brake pipe fittings at the BPMV.

    Tighten:  Tighten the brake pipe fittings to 20 N.m (15 lb ft).

  9. Install the EBCM. Refer to Electronic Brake Control Module Replacement .
    10. Fig 3: View Of Electrical Connector At EBCM
    GM1233230Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Ensure that the electrical connector is correctly inserted properly into the EBCM prior to swinging the assist locking lever into position. Failure to make a proper connection may cause communication problems with the module.
  10. Connect the electrical connector to the EBCM.
  11. Connect the electrical connector to the brake pressure sensor, if equipped.
  12. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding (Manual) or Hydraulic Brake System Bleeding (Pressure) .
    13. IMPORTANT: Do NOT start the engine, but only turn the ignition switch to the ON position.
  13. Perform the Diagnostic System Check - Vehicle .
  14. 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 .
  15. Remove the shop towel and discard into an approved container.
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