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Cloudy appearance - moisture Dark appearance/suspended particles in fluid - dirt, rust, corrosion, brake dust 2. Inspect the master cylinder reservoir cap diaphragm and the reservoir-to-master cylinder grommets for swelling, indicating brake fluid contamination. 3. If the brake fluid WAS contaminated with an oil-based or a silicone-based substance, indicated by fluid separation and/or a swollen master cylinder reservoir cap diaphragm 1. Remove ALL of the following components listed from the vehicle. Each component contains internal rubber seals/linings which have been contaminated by the Refer to the procedures indicated: Master Cylinder Replacement (JD9, JF3, JF7)Master Cylinder Front Brake Hose Replacement (JD9, JF3, JF7)Front Brake Hose Rear Brake Hose Replacement (Frame to Axle - JH6, JH7)Rear Brake Front Brake Caliper Replacement (JH6, JH7) Front Brake Caliper Rear Brake Caliper Replacement (JH6, JH7) Rear Brake Caliper Brake Pressure Modulator Valve Replacement (JD9, JF3, JF7) Brake 2. Clean out all the hydraulic brake pipes using denatured alcohol, or equivalent. 3. Dry the brake pipes using non-lubricated, filtered air. 4. Repair or replace ALL of the following components listed and install them to the vehicle. Each component contains internal rubber seals/linings which have been Refer to the procedures indicated: Master Cylinder Replacement (JD9, JF3, JF7)Master Cylinder
2008 Chevrolet Silverado 1500 2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Clean the brake master cylinder reservoir using denatured alcohol, or equivalent, Replace the brake master cylinder reservoir cap diaphragm. Front Brake Hose Replacement (JD9, JF3, JF7)Front Brake Hose Rear Brake Hose Replacement (Frame to Axle - JH6, JH7)Rear Brake Front Brake Caliper Overhaul (JH6, JH7) or Front Brake Caliper Rear Brake Caliper Overhaul (JH6, JH7) or Rear Brake Caliper Brake Pressure Modulator Valve Replacement (JD9, JF3, JF7) Brake 4. If the brake fluid was NOT contaminated with an oil-based or a silicone-based substance, but WAS contaminated with water or dirt, rust, corrosion, and/or brake dust, replace the 5. Fill the brake master cylinder reservoir to the maximum-fill level with Delco Supreme 11®, GM P/N 12377967 (Canada P/N 992667) or equivalent, DOT-3 brake fluid from a clean, 6. Pressure bleed the hydraulic brake system. Begin the procedure with the pressure bleeder reservoir filled to the maximum-fill level with the correct brake fluid as indicated. Refer to POWER VACUUM BRAKE BOOSTER REPLACEMENT (NON-ADJUSTABLE PEDALS)
2008 Chevrolet Silverado 1500 2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 33: Power Vacuum Brake Booster Replacement (Non-Adjustable Pedals) 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
POWER VACUUM BRAKE BOOSTER REPLACEMENT (ADJUSTABLE PEDALS) 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 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
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