Vacuum Pump: Service and Repair

Power Brake Booster Vacuum Check Valve and Hose Replacement (5.3L)

Removal Procedure

1. Apply and release the brake pedal several times to deplete the vacuum brake booster vacuum reserve.
2. Remove the upper intake manifold sight shield, if equipped. Refer to Upper Intake Manifold Sight Shield Replacement Upper Intake Manifold Sight Shield Replacement.




3. Disconnect the vacuum brake booster check valve (1) from the power vacuum brake booster.
Release the vacuum hose clamp and remove the check valve from the hose, if necessary.




4. Release the clamp and disconnect the vacuum hose (1) from the intake manifold vacuum port.

Installation Procedure




1. Connect the vacuum hose (1) from the intake manifold vacuum port.
Position the clamp to secure the hose to the intake manifold.




2. Install the check valve to the vacuum hose, if removed.
Position the clamp to secure the hose to the check valve.
3. Connect the vacuum brake booster check valve (1) to the power vacuum brake booster.
A small amount of denatured alcohol may be used as a lubricant to ease assembly, if necessary.
4. Install the upper intake manifold sight shield, if equipped. Refer to Upper Intake Manifold Sight Shield Replacement Upper Intake Manifold Sight Shield Replacement.