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.
2014 Chevrolet Cruze LTZFACTORY OEM SERVICE PROCEDURE
Data Communication System
- Specifications
- Schematic Wiring Diagrams
- Diagnostic Information and Procedures
- Diagnostic Code Index
- Control Module U Code List
- DTC B1000: Electronic Control Unit
- DTC B1001: Option Configuration
- DTC B101D: Electronic Control Unit Hardware
- DTC B101E: Electronic Control Unit Software
- DTC C056D: Electronic Control Unit Hardware
- DTC C056E: Electronic Control Unit Software
- DTC P0601-P0606, P060A, P062F or P262B: Control Module Read Only Memory/Control Module Processor Performance
- DTC U0001: High Speed CAN Communication Bus
- DTC U0020: Low Speed CAN Bus
- DTC U0073 or U2100: Control Module Communication Bus A/CAN Bus
- DTC U0074: Control Module Communication Bus B
- 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 U0077: Control Module Communication Chassis Expansion CAN Bus
- DTC U0078: Control Module Communication Low Speed CAN 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 U0300 - U0336: Control Module
- DTC U0400 - U05FF: Control Module
- DTC U1500-U15FF: 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 U1814: Powertrain Wake-Up Communication Circuit
- DTC U18B9-U18BF: High Speed CAN Bus Subnet Configuration List
- DTC U2099: High Speed Communication Enable Circuit
- Symptoms - Data Communications
- Scan Tool Does Not Power Up
- Scan Tool Does Not Communicate with Chassis High Speed GMLAN Device
- 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
- Body Control System Description and Operation
- Data Link Communications Description and Operation
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.