GM Service Manual Online
For 1990-2009 cars only

Power Brake Booster Vacuum Check Valve and Hose Replacement LNF

Removal Procedure


    Object Number: 1912331  Size: SH
  1. Apply and release the brake pedal several times until the pedal becomes firm to deplete the power brake booster vacuum reserve.
  2. Disconnect the power brake booster vacuum sensor electrical connector.
  3. Remove the power brake booster vacuum sensor (1) from the power vacuum brake booster.
  4. Release the hose clamp (2) and remove the vacuum hose (3) from the vacuum sensor.

  5. Object Number: 1912334  Size: SH
  6. Release the hose clamp (1) and disconnect the vacuum hose from the intake manifold vacuum port.

Installation Procedure


    Object Number: 1912334  Size: SH
  1. Position the hose clamp (1) to the vacuum hose and install the hose to the intake manifold vacuum port.

  2. Object Number: 1912331  Size: SH
  3. Install the power brake booster vacuum sensor (1) to the power vacuum brake booster.
  4. If necessary, a small amount of denatured alcohol can be used as an assembly aid for installing the vacuum sensor to the vacuum booster grommet. Do not use soap.

  5. Position the hose clamp (2) to the vacuum hose (3) and install the hose to the power brake booster vacuum sensor.
  6. If necessary, a small amount of denatured alcohol can be used as an assembly aid for installing the vacuum hose to the vacuum sensor. Do not use soap.

  7. Connect the power brake booster vacuum sensor electrical connector.

Power Brake Booster Vacuum Check Valve and Hose Replacement L61


Object Number: 1539018  Size: LF

Callout

Component Name

Preliminary Procedures

  1. Place the ignition switch in the OFF position.
  2. Apply and release the brake pedal several times until the pedal becomes firm to deplete the power brake booster vacuum reserve.

1

Vacuum Brake Booster Hose Quick Connect

2

Vacuum Brake Booster Check Valve

Tip
If necessary, a small amount of denatured alcohol can be used as an assembly aid for installing the vacuum brake booster check valve to the vacuum booster grommet. Do not use soap.

3

Vacuum Brake Booster Hose Clamp

4

Vacuum Brake Booster Hose

Tip
If necessary, a small amount of denatured alcohol can be used as an assembly aid for installing the vacuum hose to the vacuum brake booster check valve. Do not use soap.

Power Brake Booster Vacuum Check Valve and Hose Replacement LE5


Object Number: 1645904  Size: MF

Callout

Component Name

Preliminary Procedures

  1. Place the ignition switch in the OFF position.
  2. Apply and release the brake pedal several times until the pedal becomes firm to deplete the power brake booster vacuum reserve.

1

Vacuum Brake Booster Hose Clamp

2

Vacuum Brake Booster Hose Retaining Bracket

Tip

    •  Ensure the retaining bracket is properly positioned when routing the brake booster vacuum hose.
    • Ensure the vacuum brake booster hose does not interfere with the coolant hoses or the coolant reservoir tank.

3

Vacuum Brake Booster Hose Clamp

4

Vacuum Brake Booster Check Valve

Tip
If necessary, a small amount of denatured alcohol can be used as an assembly aid for installing the vacuum brake booster check valve to the vacuum booster grommet. Do not use soap.

5

Vacuum Brake Booster Hose

Tip
If necessary, a small amount of denatured alcohol can be used as an assembly aid for installing the vacuum hose to the vacuum brake booster check valve. Do not use soap.