Chevrolet Silverado EV 2024–2026 — technical service bulletin
Bulletin 661.10 · NHTSA communication 11030539 · issued Mar 21, 2026
Technical service bulletin
communication type
Unknown OR Other
component
2024–2026
model years
6
vehicle entries
Official summary
• Improvements to diagnostics and service messaging for battery health, particularly in humid conditions • Improvements to transmission diagnostics used for shifting • Improvements to charging system diagnostics • Fixes to help protect EV adapter from overheating while charging
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.