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June 22, 2026 Over-the-air update

• The active cabin ventilation feature will operate more reliably • Additional protection for the health...

GMC technical service bulletin 662.20 for 2024 GMC Hummer EV SUV and 2024 GMC Hummer EV Pickup.

Bulletin number
662.20 (662.20)
Component
Unknown or other
Summary
• 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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