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 MANUALSBUICK2012VERANOREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMDATA COMMUNICATIONS SYSTEM
2012 Buick Verano
Data Communications System
2012 Buick VeranoSECTION Data Communications System
- Specifications
- Wiring Schematics
- Diagnostic Information and Procedures
- Diagnostic Code Index
- Control Module U Code List
- DTC B1000
- DTC B1001
- DTC B101D
- DTC B101E
- DTC C0550
- DTC C056D
- DTC C056E
- DTC C078A
- DTC P0601-P0604, P0606, or P062F
- DTC U0001
- DTC U0002
- DTC U0020
- DTC U0073 or U2100
- DTC U0074
- 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 U0078
- DTC U0100 - U02FF
- 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
- DTC U0400 - U05FF
- DTC U1500-U15BF
- DTC U1814
- DTC U18B9-U18BF
- DTC U2099
- DTC U2101
- DTC U2103
- DTC U2105-U2199
- 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
- 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
- Notes
- Circuit Description
- High Speed GMLAN Circuit Description
- Chassis High Speed GMLAN Circuit Description
- CAN Graphical Interface (CGI) Circuit Description
- Mid Speed GMLAN Circuit Description
- Low Speed GMLAN Circuit Description
- Local Interconnect Network (LIN) Circuit Description
- Communication Enable Circuit Description
- Data Link Connector (DLC)
- Serial Data Reference
RENDER: 1.0x
NO RELATED
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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.