TSB: Chevy EV Updates

This bulletin applies to 2024-2025 Chevy Blazer EV, Equinox EV, Silverado EV and 2025 Bright Drop 400 vehicles.  Some customers may comment about a Service High Voltage Warning message. DTC P1C01 may be set in history. The cause may be due to software anomalies. GM is recommending to utilize Vehicle Wide Programming confirm that all modules are updated.