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1998 Chevrolet Venture

How do I replace the master cylinder

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  1. Brake Modulator/Master Cylinder Assembly Replacement

    Removal Procedure

    Warning! To help avoid personal injury, due to a retained load on the brake modulator, the Gear Tension Relief function of the scan tool must be performed prior to removal of the ABS brake modulator/master cylinder assembly.

    1998 Chevy Venture Master Cylinder Replacement Diagram

    •Use the Scan Tool in order to perform the Gear Tension Relief Sequence.
    •Disconnect two brake solenoid valve electrical connectors (1), (3).
    •Disconnect the brake fluid level indicator sensor connector (2).
    •Disconnect the ABS brake motor pack 6-way electrical connector (6).
    •Remove four brake pipes (5).
    •Remove the two nuts (8) attaching the ABS brake modulator/master cylinder assembly (7) to the vacuum booster.
    •Remove the ABS brake modulator/master cylinder assembly (7).

    Caution!
    Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

    •Install the ABS brake modulator/master cylinder assembly (7) into the vehicle.
    •Install the two nuts (8) attaching the ABS modulator/master cylinder assembly (7).
    Tighten
    Tighten the ABS brake modulator/master cylinder nuts (8) to 27 N·m (20 lb ft).
    •Install four brake pipes (5) onto the ABS brake modulator/master cylinder assembly (7).
    Tighten
    Tighten the tube nuts to 24 N·m (18 lb ft).
    •Connect the ABS brake motor pack 6-way electrical connector (6).
    •Connect the brake fluid level indicator sensor electrical connector (2).
    •Connect two brake solenoid valve electrical connectors (1), (3).

    Important
    Bleed the system.

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