Lucerne V8-4.6L (2008)
Vacuum Brake Booster: Service and Repair
Power Vacuum Brake Booster Replacement (4.6L)
Power Vacuum Brake Booster Replacement (4.6L)
Removal Procedure
1. Place the vehicle on a flat surface.
2. Block the front wheels.
3. Apply the parking brake.
4. To allow access for the removal of the vacuum brake booster, position the gearshift lever into the lowest gear.
5. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine
Performance Checks/Air Cleaner Housing/Service and Repair).
6. Disconnect the fuel vapor lines in front of the brake booster.
*
For the lines that have the plastic connectors, Refer to Plastic Collar Quick Connect Fitting Service (See: Powertrain Management/Fuel
Delivery and Air Induction/Fuel Line Coupler/Service and Repair/Plastic Collar Quick Connect Fitting Service).
*
For the lines that have the metal connectors, Refer to Metal Collar Quick Connect Fitting Service (See: Powertrain Management/Fuel Delivery
and Air Induction/Fuel Line Coupler/Service and Repair/Metal Collar Quick Connect Fitting Service).
7. Remove the master cylinder mounting nuts (3).
Important: In the following service step, the master cylinder does not have to be removed. Move the master cylinder forward just enough
to clear the studs on the vacuum brake booster. This will flex the brake pipes slightly. Do not bend or distort the pipes.
8. Disconnect the master cylinder (1) from the brake booster (2).
9. Disconnect the shift control cable from the shaft lever pin and position it out of the way. Refer to Automatic Transmission Range Selector Cable
Replacement - Console (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Shift Linkage/Shift Cable/Service and
Repair/4T80-E - Automatic Transaxle/Automatic Transmission Range Selector Cable Replacement - Console).