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June 18, 2026 Over-the-air update

• Improves traction and stability control when accelerating or on uneven terrain

Cadillac technical service bulletin 661.20 for 2025 Cadillac CT5 and 2025 Cadillac CT4.

Bulletin number
661.20 (661.20)
Component
Unknown or other
Summary
• Improves traction and stability control when accelerating or on uneven terrain. • Improves braking and stopping performance on low-traction surfaces. • Improves the performance of assisted braking features. • The active cabin ventilation feature will operate more reliably. • Additional protection for the health of your battery and updates to help prevent excessive battery drain and overheating. • Improvements will support successful software updates for your vehicle and allow you to access new features and fixes.

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