Cadillac Vistiq 2026 — technical service bulletin
Bulletin 661.30 · NHTSA communication 11034049 · issued Jun 8, 2026
Technical service bulletin
communication type
Unknown / Other
component
2026
model years
1
vehicle entries
Official summary
• Improvements to high voltage battery diagnostics • Improvements to transmission diagnostics used for shifting • Fixes to protect EV adaptor 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.