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September 2, 2026 Over-the-air update

• Improved availability and map updates for Super Cruise • Improvements to active cabin ventilation •...

GMC technical service bulletin 663.20 for 2024 GMC Hummer EV SUV and 2024 GMC Hummer EV Pickup.

Bulletin number
663.20 (663.20)
Component
Unknown or other
Summary
• Improved availability and map updates for Super Cruise • Improvements to active cabin ventilation • Additional protection for the health of your battery • Updates to help prevent excessive battery drain and overheating • Improvements to the software update system

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