Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2015EXPRESS 2500 BASE, VAN CARGO, 6.0L ENG VIN BREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMDATA COMMUNICATION SYSTEM
2015 Chevrolet Express 2500 Base, Van Cargo, 6.0L Eng VIN B
Data Communication System
2015 Chevrolet Express 2500 Base, Van Cargo, 6.0L Eng VIN BSECTION Data Communication System
- Schematic Wiring Diagrams
- Diagnostic Information and Procedures
- Control Module U Code List
- DTC B1000: Electronic Control Unit
- DTC B1001: Option Configuration Error
- DTC B1004: Keep Alive Memory
- DTC B1016: VIN Not Programmed
- DTC B101D: ECU Hardware
- DTC B101E: Electronic Control Unit Software
- DTC C0550: Electronic Control Unit Software
- DTC U0020: Low Speed CAN Communication Bus
- DTC U0073 or U2100: Control Module Communication Bus
- DTC U0074: Control Module Powertrain Expansion Communication Bus
- DTC U0100 - U02FF (except U010E, U029D and U029E): 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 U0100 - U02FF (U010E, U029D and U029E only): Lost Communication with 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
- Repair Verification
- DTC U1500, U1511, U1512, or U1513: LIN Bus/Lost Communication With RCM
- 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
- Reference Information
- Circuit/System Verification
- Circuit/System Testing
- Repair Instructions
- DTC U1814: Powertrain High Speed Communication Enable
- DTC U1826: Lost Communication With Multi-Axis Acceleration Sensor Module
- DTC U1865: Fuel Operated Heater Lost Communication with Engine Control 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
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.