Lumina V6-191 3.1L VIN T MFI (1993)
Hydraulic Modulator Assembly: Service and Repair
ABS Hydraulic Modulator/Master Cylinder Assembly
CAUTION: To help avoid personal injury, due to a retained load on the hydraulic modulator, the gear tension relief function of the Tech 1
must be performed prior to removal of the ABS hydraulic modulator/master cylinder assembly.
Remove or Disconnect
1. Using Tech 1, perform Gear Tension Relief Sequence.
2. Air cleaner.
3. Upper fuel lines and set aside.
4. Two solenoid electrical connectors.
5. Fluid level sensor electrical connector.
6. 6-Pin motor pack electrical connector.
7. Four brakes pipes.
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Place shop cloth on top of motor pack to catch any dripping fluid. Take care not to allow brake fluid to enter the bottom of the motor pack or
the electrical connectors. Plug open lines to prevent fluid loss and contamination.
8. Two nuts attaching hydraulic modulator/master cylinder assembly to vacuum booster.
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It may be necessary to remove vacuum check valve from vacuum booster to gain access to the nut closest to the check valve.
9. Hydraulic modulator/master cylinder assembly.
Install or Connect
1. Hydraulic modulator/master cylinder assembly in vehicle.
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It may be necessary to remove vacuum check valve from vacuum booster to gain access to the nut closest to the check valve.
2. Two nuts attaching hydraulic modulator/master cylinder assembly to vacuum booster.