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Home >> Cadillac >> 2008 >> XLR Base >> Repair and Diagnosis >> Brakes >> Anti-Lock Brake System, Traction Control System & Stability Control System >> Repair Instructions >> Brake Pressure Modulator Valve Replacement (with LC3) >> Removal Procedure

Removal Procedure

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.
IMPORTANT:
  • The ignition switch must be placed in 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 battery 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 active, this will cause various DTCs to be set.
  1. Place the ignition switch into OFF mode. Do NOT place the ignition switch into ignition ON engine OFF mode.
  2. Wait for a minimum of 2 minutes to allow the high-speed LAN control modules to deactivate.
  3. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  4. Partially drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) or Cooling System Draining and Filling (GE 47716) .
  5. Remove the intake manifold sight shield. Refer to Intake Manifold Sight Shield Replacement .
  6. Disconnect the upper radiator hose. Refer to Radiator Inlet Hose Replacement .
    7. Fig 1: View Of Surge Tank Inlet Hose
    GM932444Courtesy of GENERAL MOTORS CORP.
  7. Disconnect the surge tank inlet hose. Refer to Radiator Surge Tank Inlet Hose/Pipe Replacement .
  8. Position both hoses aside in order to gain access.
  9. Remove the drive belt tensioner. Refer to Drive Belt Tensioner Replacement - Supercharger .
    10. Fig 2: View Of Brake Fluid Pressure Sensor Connector & Nuts
    GM1274762Courtesy of GENERAL MOTORS CORP.
  10. Disconnect the brake fluid pressure sensor connector.
  11. Loosen the two insulator nuts located on each side of the brake pressure modulator valve (BPMV).
    12. Fig 3: View Of Master Cylinder
    GM1274764Courtesy of GENERAL MOTORS CORP.
  12. Disconnect and plug the brake pipes that enter the BPMV from the master cylinder (1).
    13. Fig 4: View Of Brake Pipe Locations
    GM1274763Courtesy of GENERAL MOTORS CORP.
  13. Disconnect and plug the brake pipes that enter the BPMV from the front and rear calipers, noting their locations (1).
  14. Disconnect the electronic brake control module (EBCM) connector.
  15. Remove the BPMV/EBCM.
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