Sierra 3500 4WD V8-8.1L VIN G (2006)
1. Install the master cylinder reservoir.
2. Bench bleed the master cylinder. Refer to Master Cylinder Bench Bleeding .
3. Install the master cylinder to the vehicle.
4. Notice: Refer to Fastener Notice in Service Precautions.
Install the master cylinder mounting nuts.
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Tighten the nuts to 33 Nm (24 ft. lbs.).
5. Remove the rubber cap or plug from the exposed brake pipe fitting ends.
6. Connect the brake pipes.
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Tighten the pipe fittings to 25 Nm (18 ft. lbs.).
7. Connect the electrical connector to the brake fluid level sensor.
8. Bleed the hydraulic brake system.
9. Release the park brake and unblock the wheels.
Master Cylinder Replacement (Vacuum Boost)
Master Cylinder Replacement (Vacuum Boost)
Removal Procedure
Caution: Refer to Brake Fluid Irritant Caution in Service Precautions.
Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Service Precautions.
1. Apply the park brake and block the wheels.
2. Disconnect the electrical connector from the brake fluid level sensor.
3. Disconnect the brake pipes from the master cylinder.
4. Important: Install a rubber cap or plug to the exposed brake pipe fitting ends in order to prevent brake fluid loss and contamination.
Plug the open brake pipe ends.
