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June 24, 2026 Service bulletin

This information addresses a potential software anomaly that may

Chevrolet technical service bulletin PIP6122B for 2027 Chevrolet Bolt EV.

Bulletin number
PIP6122B
Component
Unknown or other
Summary
This information addresses a potential software anomaly that may cause a MIL illumination, a Service High Voltage message on the IPC, and, when the DTC is current, a no-start condition while the vehicle is in Run/Propulsion mode. If one or more of the listed DTCs are stored in history, technicians are to perform SPS2 Hybrid/EV Battery Data Retrieval per Bulletin 25-NA-044, create a TAC case referencing the applicable P.I. number, and include the WCC obtained from the SPS data retrieval. TAC will provide further direction after engineering reviews the vehicle-specific data. This information applies only to the listed DTCs and symptom bytes and does not apply if the codes or symptom bytes differ.

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