• Improvements to active cabin ventilation • Additional protection for the health of your battery •...
GMC technical service bulletin 662.20 for 2025 GMC Hummer EV SUV and 2025 GMC Hummer EV Pickup.
- Bulletin number
- 662.20 (662.20)
- Component
- Unknown or other
- Summary
- • 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
Vehicles covered
- GMC Hummer EV SUV 2025 2025
- GMC Hummer EV Pickup 2025 2025
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