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BRAKES SELF APPLY WHEN TURNING STEERING WHEEL booster? Go to Step 4 Go to Step 6 4 1. Disconnect the vacuum check valve from the booster to relieve vacuum reserve. 2. Separate the master cylinder from the vacuum brake booster. Do not disconnect 3. Inspect the rear of the master cylinder for a brake fluid leak. 4. Inspect for brake fluid in the vacuum brake booster. Did you find a brake fluid leak? Go to Step 5 Go to Diagnostic 5 Replace the brake master cylinder and the Go to Step 8 - 6 1. Wipe clean the external surface of the master cylinder to hydraulic brake booster 2. Separate the master cylinder from the hydraulic brake booster, if equipped. Do 3. Inspect the rear of the master cylinder for a brake fluid leak. Did you find a brake fluid leak? Go to Step 7 Go to Diagnostic 7 Replace the brake master cylinder. Go to Step 8 - 8 1. Install or connect components that were removed or disconnected during diagnosis. 2. Road test the vehicle to confirm proper operation. Refer to Brake System Vehicle Is the condition still present? Go to Step 2 System OK
2008 Chevrolet Silverado 1500 2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
DISC BRAKE SYSTEM DIAGNOSIS Test Description The numbers below refer to the step numbers on the diagnostic table: 9: Lubricant leaks from non-brake system components may come in contact with and 10: Lubricant leaks from non-brake system components may come in contact with and 12: Disc brake rotor shields/backing plates that come in contact with disc brake rotors may 15: Disc brake rotor thickness variation that exceeds the maximum acceptable level can 19: Disc brake rotor thickness variation that exceeds the maximum acceptable level can 22: Disc brake rotor assembled lateral runout (LRO) that exceeds the maximum acceptable Step Action Yes No 1 Were you sent here from the Hydraulic Brake Go to Step 2 Go to Diagnostic 2 Inspect the brake assist system for proper Go to Step 4 Go to Step 3 3 Inspect the steering system for proper operation. Go to Step 4 Go to Diagnostic 4 Road test the vehicle in order to confirm proper Go to Step 2 System OK
2008 Chevrolet Silverado 1500 2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Step Action Yes No DEFINITION: This diagnostic table is designed to diagnose ONLY the components of the 1 Were you sent here from a Brake Symptom Go to Step 2 Go to Diagnostic 2 Visually inspect the disc brake pads for the Lining thickness below specifications Uneven and/or abnormal wear - edge-to- Looseness or damage - including pad Evidence of contamination from an Go to Step 3 Go to Step 12 3 Are any of the front and/or rear disc brake pads Go to Step 8 Go to Step 4 4 Are any of the front and/or rear disc brake pads Go to Step 7 Go to Step 5 5 Are any of the front and/or rear disc brake pads Go to Step 7 Go to Step 6 6 1. Remove and inspect the worn disc brake pads for glazing, looseness, heat spots or 2. Replace the worn disc brake pads as a complete axle set. Refer to Front Disc -
2008 Chevrolet Silverado 1500 2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
(JD9, JF3, JF7) and/or Rear Disc Brake Did you complete the inspection and Go to Step 12 1. Remove the front and/or rear disc brake calipers, as appropriate, from the 2. Inspect the disc brake caliper mounting bracket and the mounting/sliding Refer to Front Disc Brake Mounting Binding or seized hardware Worn, damaged or missing hardware NOTE: Support the brake caliper with heavy IMPORTANT: Do NOT disconnect the hydraulic brake flex
2008 Chevrolet Silverado 1500 2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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