• Additional protection for battery health and to help prevent battery drain • Improved charging messaging...
GMC technical service bulletin 662.20 for 2026 GMC Hummer EV SUV and 2026 GMC Hummer EV Pickup.
- Bulletin number
- 662.20 (662.20)
- Component
- Unknown or other
- Summary
- • Additional protection for battery health and to help prevent battery drain • Improved charging messaging in the driver display • Improved vehicle diagnostics • Improved vehicle performance when driving in Reverse on slippery surfaces • Better One-Pedal Driving performance • Additional protection for battery health and prevention for battery drain • Improved accuracy for driver display message
Vehicles covered
- GMC Hummer EV SUV 2026 2026
- GMC Hummer EV Pickup 2026 2026
VIN decoder
See the problems and recalls for an exact car
Buying a used GMC Hummer EV SUV?
Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.
Check its history