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Chevrolet Silverado / GMC Sierra. Manual - part 2390
Fig. 34: Power Vacuum Brake Booster Replacement (Adjustable Pedals)
Courtesy of GENERAL MOTORS CORP.
Callout
Component Name
Preliminary Procedures
1. Apply the park brake.
2. Deplete the vacuum reserve in the vacuum booster by applying the brake pedal 3 times
or until the pedal becomes firm.
1
Brake Booster Pushrod Retainer Bolt
Tighten: 10 N.m (89 lb in)
NOTE:
Refer to Fastener Notice .
2
Brake Booster Pushrod Retainer
3
Stop Lamp Switch
4
Brake Booster Pushrod
Brake Booster Nut (Qty: 4)
2008 Chevrolet Silverado 1500
2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
VACUUM BRAKE BOOSTER CHECK VALVE AND/OR HOSE REPLACEMENT
5
Tip: Tighten the upper right vacuum brake booster nut first.
Tighten: 33 N.m (24 lb ft)
6
Master Cylinder Nut (Qty: 2)
Tighten: 33 N.m (24 lb ft)
7
Master Cylinder Assembly
Procedure
1. Without disconnecting the brake pipe fittings, carefully position the master
cylinder assembly aside and support with heavy mechanics wire or
equivalent.
2. Inspect the brake master cylinder to vacuum brake booster seal for damage
and replace if necessary.
3. Ensure the brake master cylinder to vacuum brake booster seal is properly
seated in the groove of the master cylinder.
8
Vacuum Brake Booster Hose Clamp
9
Vacuum Brake Booster Hose
10
Vacuum Brake Booster
Procedure
1. Disconnect the vacuum brake booster electrical connectors, if equipped.
2. Discard the vacuum brake booster gasket.
3. Install a new vacuum brake booster gasket.
2008 Chevrolet Silverado 1500
2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 35: Vacuum Brake Booster Check Valve and/or Hose Replacement
Courtesy of GENERAL MOTORS CORP.
BRAKE MASTER CYLINDER PRESSURE SENSOR REPLACEMENT (WITH RPO JL1 AND
WITHOUT JL4)
Callout
Component Name
Preliminary Procedures
1. Deplete the vacuum reserve in the vacuum booster by applying the brake pedal 3 times
or until the pedal becomes firm.
2. If equipped with the 4.8L, 5.3L, 6.0L, or 6.2L engine, remove the upper intake
manifold sight shield. Refer to Upper Intake Manifold Sight Shield Replacement .
1
Vacuum Brake Booster Hose Clamp
2
Vacuum Brake Booster Hose Clamp
3
Vacuum Brake Booster Hose
4
Vacuum Brake Booster Check Valve
2008 Chevrolet Silverado 1500
2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 36: Brake Master Cylinder Pressure Sensor Replacement (With RPO JL1 and
Without JL4)
Courtesy of GENERAL MOTORS CORP.
Callout
Component Name
Preliminary Procedures
1. Turn the ignition switch to the OFF position.
2. Apply the park brake.
CAUTION:
Refer to Brake Fluid Irritant Caution .
NOTE:
Refer to Brake Fluid Effects on Paint and Electrical Components Notice .
2008 Chevrolet Silverado 1500
2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Content .. 2388 2389 2390 2391 ..