GM Service Manual Online
For 1990-2009 cars only

Power Vacuum Brake Booster Replacement 3.5L, 3.9L


Object Number: 1661276  Size: MF

Callout

Component Name

Preliminary Procedures

  1. If equipped with the 3.5L engine, remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
  2. If equipped with the 3.9L engine, remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
  3. If equipped with the 3.5L engine, remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
  4. If equipped with the 3.9L engine, remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
  5. Remove the brake pressure modulator valve (BPMV) mounting bracket. Refer to Brake Pressure Modulator Valve Bracket Replacement .
  6. Important: Cap or plug all brake pipe fittings and open master cylinder ports to prevent fluid leakage and contamination.

  7. Remove the master cylinder assembly. Refer to Master Cylinder Replacement .
  8. Remove the exhaust crossover pipe. Refer to Exhaust Crossover Pipe Replacement .
  9. Disconnect the vacuum hose from the vacuum brake booster check valve.

1

Brake Booster Electrical Connector

2

Vacuum Brake Booster Release Lever

3

Tool

Tip
Using the J 22805-B , remove the brake booster.

Special Tools

J 22805-B Brake Booster Holder

4

Vacuum Brake Booster

Power Vacuum Brake Booster Replacement 5.3L


Object Number: 1661276  Size: MF

Callout

Component Name

Preliminary Procedures

  1. Remove the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement.
  2. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement.
  3. Remove the brake pressure modulator valve (BPMV) mounting bracket. Refer to Brake Pressure Modulator Valve Bracket Replacement.
  4. Remove the master cylinder assembly. Refer to Master Cylinder Replacement.
  5. Remove the exhaust crossover pipe. Refer to Exhaust Crossover Pipe Replacement.
  6. Disconnect the vacuum hose from the vacuum brake booster check valve.

1

Brake Booster Electrical Connector

2

Release Lever

3

Tool

Tip
Using the J 22805-B , remove the brake booster.

Special Tools

J 22805-B Brake Booster Holder

4

Brake Booster

Tip

    • It may be necessary to remove the retaining bolts for the coolant lines underneath the throttle body and at the front of the engine to relocate the coolant lines to remove the booster.
    • Bleed the brake system. Refer to Hydraulic Brake System Bleeding.