Removal Procedure
- Place the vehicle on a flat surface.
- Chock the wheels to prevent the vehicle from moving.
- Set the parking brake.
- To allow access for the removal of the vacuum brake booster, position
the gearshift lever into the lowest gear.
- Remove the cross vehicle brace. Refer to
Cross Vehicle Brace Replacement
in Body Front End.
- Remove the cruise control module and position out of the way.
Refer to
Cruise Control Module Replacement
in
Cruise control.
- Remove the air cleaner assembly. Refer to
Air Cleaner Assembly Replacement
in Engine Controls - 4.6L.
- Disconnect the accelerator cable and position out of the way.
Refer to
Accelerator Control Cable Replacement
in Engine Controls - 4.6L.
- Remove the master cylinder
from the vacuum brake booster and position out of the way. Refer to
Master Cylinder Replacement
.
- Disconnect the vacuum check valve (1) from the vacuum brake
booster (2) and position out of the way.
- Disconnect the shift control cable from the shaft lever pin and
position out of the way. Refer to
Range Selector Lever Cable Replacement
in Axle Transaxle 4T80E.
- Disconnect the secondary air injection pipe. Refer to
Secondary Air Injection Shutoff Valve Replacement - Bank 1
in Engine Controls - 4.6L.
- Remove the left closeout insulator panel. Refer to
Instrument Panel Insulator Panel Replacement - Left Side
in
Instrument Panel, Gages, and Console.
- Remove the left knee bolster. Refer to
Driver Knee Bolster Panel Replacement
in Instrument Panel, Gages,
and Console.
- Remove the vacuum brake
booster retainer (2 ) from the brake pedal clevis pin.
- Remove the foam spacer (1) from the brake pedal clevis
pin.
- Disconnect the vacuum brake booster pushrod from the brake pedal
clevis pin.
- Remove the brake pedal assembly to booster stud mounting nuts.
- Remove the vacuum brake booster from the vehicle.
- Remove the brake booster mounting gasket, if gasket replacement
is necessary.
Installation Procedure
- Install the brake booster mounting gasket to vacuum brake booster,
if removed previously.
- Install the vacuum brake
booster to the vehicle.
Notice: Use the correct fastener in the correct location. Replacement fasteners
must be the correct part number for that application. Fasteners requiring
replacement or fasteners requiring the use of thread locking compound or sealant
are identified in the service procedure. Do not use paints, lubricants, or
corrosion inhibitors on fasteners or fastener joint surfaces unless specified.
These coatings affect fastener torque and joint clamping force and may damage
the fastener. Use the correct tightening sequence and specifications when
installing fasteners in order to avoid damage to parts and systems.
- Install the brake
pedal assembly to booster stud mounting nuts.
Tighten
Tighten the brake pedal assembly to booster stud mounting nuts to 23 N·m
(17 lb ft).
- Apply a small amount of
lubricant, (GM P/N 12346293) or equivalent to the clevis pin
of the brake pedal.
- Connect the vacuum brake booster pushrod to the brake pedal clevis
pin.
- Install the foam spacer (1) to the brake pedal clevis pin.
- Install the retainer clip (2) to the brake pedal clevis
pin.
- Install the left knee bolster. Refer to
Driver Knee Bolster Panel Replacement
in Instrument Panel, Gages,
and Console.
- Install the left closeout insulator panel. Refer to
Instrument Panel Insulator Panel Replacement - Left Side
in
Instrument Panel, Gages, and Console.
- Connect the secondary air injection pipe. Refer to
Secondary Air Injection Shutoff Valve Replacement - Bank 1
in Engine Controls - 4.6L.
- Connect the shift control cable to the shaft lever pin. Refer
to
Range Selector Lever Cable Replacement
in Axle Transaxle - 4T80E.
- Install the vacuum brake booster check valve.
- Install the master cylinder to the vacuum brake booster. Refer
to
Master Cylinder Replacement
.
- Connect the accelerator cable. Refer to
Accelerator Control Cable Replacement
in Engine Controls -
4.6L.
- Install the air cleaner assembly. Refer to
Air Cleaner Assembly Replacement
in Engine Controls - 4.6L.
- Install the cruise control module. Refer to
Cruise Control Module Replacement
in Cruise Control.
- Install the cross vehicle brace. Refer to
Cross Vehicle Brace Replacement
in Body Front End.
- Move the shift lever to park.
- Remove the wheel chock from the wheels.