• Improvements to high voltage battery diagnostics • Improvements to transmission diagnostics used for...
Cadillac technical service bulletin 661.20 for 2026 Cadillac Optiq.
- Bulletin number
- 661.20 (661.20)
- Component
- Unknown or other
- 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
- Cadillac Optiq 2026 2026
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