Chevrolet Silverado / GMC Sierra. Manual — part 718
An internal EBCM malfunction exists.
Action Taken When the DTC Sets
One or more of the following actions may occur:
The antilock brake system (ABS) and vehicle stability enhancement system (VSES) are
disabled.
TCS is degraded.
The ABS/TCS indicators turn ON.
The red BRAKE Warning indicator turns ON.
Conditions for Clearing the DTC
The condition for the DTC is no longer present.
The EBCM automatically clears the history DTC when a current DTC is not detected in 100
consecutive drive cycles.
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
ABS Description and Operation (With JL4) or ABS Description and Operation (Without
JL4)
Electrical Information Reference
Circuit Testing
Connector Repairs
Testing for Intermittent Conditions and Poor Connections
Wiring Repairs
Scan Tool Reference
2008 Chevrolet Silverado 1500
2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Control Module References for Scan Tool Information
Circuit/System Verification
1. Verify that DTC C0550 is not set.
If the DTC is set, clear the DTC with a scan tool, and operate the vehicle within the
conditions for setting the DTC. If the DTC reset, replace the EBCM.
Repair Procedures
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for EBCM replacement, setup, and programming
DTC C0561
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 C0561 71
System Disabled Information Stored Invalid Serial Data Received
DTC C0561 72
System Disabled Information Stored Alive Counter Incorrect or not Updated
DTC C0561 74
System Disabled Information Stored Value of Signal Protection Calculation Incorrect
Circuit/System Description
The electronic brake control module (EBCM) receives messages from other modules over
GMLAN which are needed to perform antilock brake system (ABS), vehicle stability
enhancement system (VSES), or traction control system (TCS) functions.
Conditions for Running the DTC
2008 Chevrolet Silverado 1500
2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
The ignition switch is in the ON position.
Ignition voltage is greater than 9.5 volts.
Conditions for Setting the DTC
The EBCM receives an invalid message from another module over GMLAN which causes EBCM
to deactivate ABS, VSES, TCS, etc.
Action Taken When the DTC Sets
One or more of the following actions may occur:
The EBCM disables the ABS/TCS/VSES for the duration of the ignition cycle.
The dynamic rear proportioning (DRP) may be disabled and the Brake Warning indicator
may turn ON.
The Stability Caution indicator turns ON.
The driver information center (DIC) displays the SERVICE STAB SYS message.
The DIC displays the TRACTION FAILED message.
Conditions for Clearing the DTC
The condition for the DTC is no longer present.
The EBCM automatically clears the history DTC when a current DTC is not detected in 100
consecutive drive cycles.
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
ABS Description and Operation (With JL4) or ABS Description and Operation (Without
JL4)
Electrical Information Reference
2008 Chevrolet Silverado 1500
2008 BRAKES Antilock Brake System - 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. Perform the Diagnostic System Check Vehicle. Diagnose any other DTCs before attempting
to diagnosis of C0561.
2. With a Tech 2, view the Invalid Signal Data Display.
3. If no invalid signal are present, view Signal Fault Data in the Enhanced DTC Data.
4. Refer to appropriate module for diagnosing the invalid message data.
5. Do not replace the EBCM due to this DTC fault.
Repair Verification
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
DTC C0569
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 C0569 00
System Configuration Error
Circuit/System Description
The electronic brake module (EBCM) receives a GMLAN message from each of the network
modules. Each module contains its own unique identification (ID) code that must be learned into
2008 Chevrolet Silverado 1500
2008 BRAKES Antilock Brake System - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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