Data Communication System (Coupe)
- Schematic Wiring Diagrams
- Diagnostic Information and Procedures
- Control Module U Code List
- DTC B1000: Electronic Control Unit/Side Object Detection
- DTC B1001: Option Configuration Error
- DTC B1009: EEPROM Checksum Mismatch/Error
- DTC B101D: Electronic Control Unit Hardware
- DTC B101E: Electronic Control Unit Software
- DTC C0550: Electronic Control Unit
- DTC C056D: Electronic Control Unit Hardware
- DTC C056E: Electronic Control Unit Software
- DTC U0020: Low Speed CAN Communication Bus
- DTC U0073 or U2100: Control Module Communication Bus/Controller Area Network (CAN) Bus/ECU LS Bus/ECU HS Bus
- DTC U0100 - U02FF: Control Module
- Diagnostic Instructions
- DTC Descriptor
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC U0400 - U05FF: Control Module
- DTC U1001-U1254: Lost Communication with OnStar
- DTC U1500, U1511, U1512, or U1513: Inter-Device Dedicated Bus
- Diagnostic Instructions
- DTC Descriptors
- Diagnostic Fault Information
- Circuit/System Description
- Conditions for Running the DTC
- Conditions for Setting the DTC
- Action Taken When the DTC Sets
- Conditions for Clearing the DTC
- Diagnostic Aids
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC U1814: Powertrain High Speed Communication Enable
- DTC U1826 or U1827: Lost Communication With Module
- DTC U2099: High Speed Communication Enable
- Symptoms - Data Communications
- Scan Tool Does Not Power Up
- Scan Tool Does Not Communicate with High Speed GMLAN Device
- Scan Tool Does Not Communicate with Low Speed GMLAN Device
- Data Link References
- Repair Instructions
- Description and Operation