DTC Codes
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      GMC SRS (Supplemental Restraint System)/Airbag Diagnostic Trouble Codes (DTCs)

      GMC Airbag/SRS Diagnostic Trouble Codes (DTCs): Comprehensive Troubleshooting Guide

      When the airbag warning light illuminates in a GMC vehicle, it signals a potential issue with the Supplemental Restraint System (SRS). Understanding the specific Diagnostic Trouble Codes (DTCs) is crucial for effective troubleshooting and repair. This guide provides detailed information on common GMC SRS/Airbag DTC codes related to the airbag control module—also known as the Sensing and Diagnostic Module (SDM)—airbags, seat belts, impact sensors, collapsible steering columns, and pyrotechnic fuses. Components that MyAirbags can rebuild or service are highlighted to assist you in efficient and cost-effective repairs.

      Understanding GMC's SRS/Airbag System

      GMC vehicles are equipped with advanced SRS/Airbag systems designed to enhance occupant safety. The system includes multiple sensors, the SDM, airbags, and seat belt components that must function correctly. Faults in any of these components can trigger DTCs and illuminate the airbag warning light.

      Common Sensing and Diagnostic Module (SDM) Faults

      B1000 – Electronic Control Unit (ECU) Malfunction

      • Description: Indicates an internal fault within the airbag control module (SDM).
      • Possible Causes: Software corruption, hardware failure, moisture intrusion.
      • Solution: MyAirbags can reset and repair the SDM, restoring it to proper working condition.

      B1019 – SRS Configuration Error

      • Description: Configuration error detected in the SDM.
      • Possible Causes: Incorrect module programming, software issues, internal faults.
      • Solution: MyAirbags can reprogram and reset the SDM, correcting configuration errors.

      Airbag Deployment Circuit Faults

      B0012 – Driver Frontal Deployment Loop Open

      • Description: Open circuit detected in the driver's airbag deployment loop.
      • Possible Causes: Damaged wiring, faulty clock spring, poor electrical connections, defective airbag module.
      • Note: Airbag modules must be replaced; they cannot be repaired.

      B0013 – Driver Frontal Deployment Loop Short to Ground

      • Description: Short to ground in the driver's airbag deployment circuit.
      • Possible Causes: Shorted wiring, connector problems, defective airbag module.
      • Note: Replacement of the airbag module is required for safety.

      B0022 – Passenger Frontal Deployment Loop Open

      • Description: Open circuit detected in the passenger's airbag deployment loop.
      • Possible Causes: Wiring issues, connector problems, faulty passenger airbag module.
      • Note: Airbag modules need to be replaced; they are not serviceable.

      B0024 – Passenger Frontal Deployment Loop Short to Ground

      • Description: Short to ground in the passenger's airbag deployment circuit.
      • Possible Causes: Shorted wiring, connector issues, defective airbag module.
      • Note: Replacement of the airbag module is necessary.

      Seat Belt Pretensioner Faults

      B0016 – Driver Seat Belt Pretensioner Deployment Loop Open

      • Description: Open circuit in the driver's seat belt pretensioner wiring.
      • Possible Causes: Damaged pretensioner, faulty wiring, connector issues.
      • Solution: MyAirbags can rebuild and repair seat belt pretensioners, restoring them to functional condition.

      B0017 – Driver Seat Belt Pretensioner Deployment Loop Short to Ground

      • Description: Short to ground in the driver's seat belt pretensioner circuit.
      • Possible Causes: Exposed wiring, internal pretensioner fault.
      • Solution: MyAirbags can rebuild and repair seat belt pretensioners, resolving electrical issues.

      B0019 – Passenger Seat Belt Pretensioner Deployment Loop Open

      • Description: Open circuit in the passenger's seat belt pretensioner wiring.
      • Possible Causes: Similar issues as the driver's side pretensioner.
      • Solution: MyAirbags can rebuild and repair passenger seat belt pretensioners, ensuring proper operation.

      B0020 – Passenger Seat Belt Pretensioner Deployment Loop Short to Ground

      • Description: Short to ground in the passenger's seat belt pretensioner circuit.
      • Possible Causes: Wiring shorts, connector problems, internal pretensioner fault.
      • Solution: MyAirbags can rebuild and repair seat belt pretensioners, fixing electrical faults.

      Impact Sensor Issues

      B0083 – Right Front Impact Sensor Fault

      • Description: Faulty signal from the right front impact sensor.
      • Possible Causes: Sensor damage due to collision, wiring problems, faulty connections.
      • Recommendation: Impact sensors typically need to be replaced; repair is not recommended.

      B0084 – Left Front Impact Sensor Fault

      • Description: Faulty signal from the left front impact sensor.
      • Possible Causes: Similar issues as the right front impact sensor.
      • Recommendation: Replace the faulty sensor to ensure proper SRS functionality.

      B0085 – Right Side Impact Sensor Fault

      • Description: Faulty signal from the right side impact sensor.
      • Possible Causes: Sensor damage, wiring issues, mounting problems.
      • Recommendation: Replacement of the sensor is necessary for safety.

      B0086 – Left Side Impact Sensor Fault

      • Description: Faulty signal from the left side impact sensor.
      • Possible Causes: Similar issues as the right side impact sensor.
      • Recommendation: Replace the faulty sensor to maintain SRS integrity.

      Pyrotechnic Battery Disconnect (Pyro Fuse) Faults

      B1016 – Battery Voltage Low

      • Description: Open circuit in the pyrotechnic battery disconnect wiring.
      • Possible Causes: Activation due to collision, faulty wiring, connector problems.
      • Solution: MyAirbags can repair or replace the pyrotechnic battery fuse, restoring proper circuit function.

      B1017 – Battery Voltage High

      • Description: High voltage detected in the pyrotechnic battery circuit.
      • Possible Causes: Faulty pyrofuse, wiring issues, charging system problems.
      • Solution: MyAirbags can service the pyrotechnic battery fuse, ensuring the SRS has proper voltage levels.

      B1325 – Control Module Power Circuit Low Voltage

      • Description: Low voltage detected in the control module power circuit.
      • Possible Causes: Faulty pyrofuse, battery issues, wiring problems.
      • Solution: MyAirbags can repair or replace the pyrofuse, restoring correct voltage to the SDM.

      Additional Common Faults

      B0081 – Passenger Presence System Malfunction

      • Description: Issues with the system that detects passenger presence and weight.
      • Possible Causes: Damaged passenger presence sensor, faulty wiring, connector issues.
      • Recommendation: May require sensor replacement or professional calibration; consult a specialist.

      U0151 – Lost Communication with Sensing and Diagnostic Module (SDM)

      • Description: Communication failure between the SDM and other vehicle systems.
      • Possible Causes: Faulty control module, network communication issues, damaged wiring.
      • Solution: MyAirbags can repair or reset the SDM, restoring communication.

      How MyAirbags Can Help

      MyAirbags specializes in repairing and resetting airbag control modules (SDMs) and rebuilding seat belt pretensioners for GMC vehicles. By servicing these components, MyAirbags can help you:

      • Save Money: Repairing components is often more cost-effective than purchasing new parts.
      • Ensure Safety: Restored components meet OEM specifications and safety standards.
      • Clear Fault Codes: Proper repairs allow for clearing DTCs and turning off the airbag warning light.

      Troubleshooting and Repair Tips

      • Professional Diagnostics: Use GMC-compatible diagnostic tools to accurately read and interpret SRS fault codes.
      • Visual Inspection: Examine wiring harnesses, connectors, and components for damage, corrosion, or disconnections.
      • Safety First: Disconnect the battery and wait at least 10 minutes before working on SRS components to prevent accidental airbag deployment.
      • OEM Parts: Replace non-repairable components with genuine GMC parts to maintain system integrity.
      • Consult Experts: Seek professional assistance for complex issues or if unsure about repair procedures.

      Recommendations for Salvage Rebuilders

      1. Accurate Diagnostics

        • Utilize professional-grade diagnostic equipment to identify all stored DTCs and understand the underlying issues.

      2. Use Professional Repair Services

        • For components like the SDM and seat belt pretensioners, consider using MyAirbags to ensure they meet OEM specifications and safety requirements.

      3. Regulatory Compliance

        • Ensure all repairs comply with local and federal safety regulations, including those set by the National Highway Traffic Safety Administration (NHTSA), to guarantee the vehicle's roadworthiness.

      4. Detailed Documentation

        • Maintain comprehensive records of diagnostics, repairs, parts used, and services performed for transparency, legal compliance, and future reference.

      5. Continuous Education

        • Stay informed about GMC service bulletins, safety recalls, and updates related to the SRS/Airbag system to enhance repair quality and safety.

      Disclaimer

      The codes listed above are generalized and may vary depending on the specific model and year of the GMC vehicle. For precise diagnostics, always refer to the manufacturer's service information or use a professional-grade diagnostic scanner. MyAirbags can help repair and reset specific SRS components, but always ensure that repairs are performed by qualified professionals to maintain vehicle safety and compliance with regulations.

      By understanding these common DTCs and knowing which components can be repaired or need replacement, you can effectively troubleshoot and resolve SRS issues in GMC vehicles. Utilizing professional services like MyAirbags not only saves time and money but also ensures that safety systems are restored to their original standards, keeping you and your passengers safe on the road.