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BRAKE SYSTEM SPECIFICATIONS SCHEMATIC AND ROUTING DIAGRAMS HYDRAULIC BRAKE SCHEMATICS Fig. 1: Hydraulic Brake Schematic DIAGNOSTIC INFORMATION AND PROCEDURES Application Specification Metric English Brake Pedal Maximum Travel* Vacuum Power Assist 60 mm 2.36 in Hydraulic Power Assist 90 mm 3.54 in * Specification with 445 N (100 lbs) of force applied to the brake pedal, the ignition OFF,
2008 Chevrolet Silverado 1500 2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
DIAGNOSTIC CODE INDEX DIAGNOSTIC CODE INDEX DIAGNOSTIC STARTING POINT - HYDRAULIC BRAKES Begin the system diagnosis by reviewing the system Description and Operation. Reviewing the DTC C0267 Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. DTC Descriptor DTC C0267 00 Low Brake Fluid Indicated Diagnostic Fault Information Circuit/System Description The brake fluid level switch monitors the level of brake fluid in the master cylinder. When the DTC Description DTC C0267 C0267 00: Low Brake Fluid Indicated Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance Brake Fluid Level Signal C0267 00 1 1 - Park Brake Signal 1 1 1 - Ground - 1 - - 1. Brake Warning Indicator Malfunction
2008 Chevrolet Silverado 1500 2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
instrument panel cluster (IPC) sees the brake fluid level switch input closed, it turns ON the Red Conditions for Running the DTC The ignition is ON. Conditions for Setting the DTC Low brake fluid is detected. A short to ground exists on the signal circuit. Action Taken When the DTC Sets The EBCM disables the antilock brake system (ABS)/traction control system (TCS) The ABS indicator illuminates. The StabiliTrak indicator illuminates. The Red Brake Warning indicator illuminates. Conditions for Clearing the DTC The condition for the DTC is no longer present. The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive Reference Information Schematic Reference Hydraulic Brake Schematics Connector End View Reference Component Connector End Views Description and Operation Brake Warning System Description and Operation Electrical Information Reference
2008 Chevrolet Silverado 1500 2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Control Module References for scan tool information Circuit/System Verification 1. Inspect for proper brake fluid level, the fluid level should be at or above the proper level. If low, refer to Brake Fluid Loss. 2. Ignition ON, observe the scan tool IPC Brake Fluid parameter. The reading should be OK. Circuit/System Testing 1. Ignition OFF, disconnect the harness connector at the brake fluid level switch. 2. Test for less than 1 ohm between the ground circuit terminal A and ground. If greater than the specified range, test the ground circuit for an open/high resistance. 3. Ignition ON, verify the scan tool IPC Brake Fluid parameter is Ok. If not the specified value, test the signal circuit for a short to ground. If the circuit tests 4. Install a 3A fused jumper wire between the signal circuit terminal B and ground. Verify the scan tool IPC Brake Fluid parameter is Low. If not the specified value, test the signal circuit for a short to voltage or an open/high 5. If all circuits test normal, test or replace the brake fluid level switch. Component Testing 1. Ignition OFF, disconnect the harness connector at the brake fluid level switch. 2. Test for infinite resistance between the ground terminal A and the signal terminal B. If less than the specified value, replace the brake fluid level switch. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
2008 Chevrolet Silverado 1500 2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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