Great News! Your vehicle keeps getting better
GMC technical service bulletin N25-249834 for 2025 GMC Hummer EV Pickup.
- Bulletin number
- N25-249834 (N25-249834)
- Component
- Unknown or other
- Summary
- Great News! Your vehicle keeps getting better. This software update includes the following, if your vehicle is equipped: • Improves accuracy of service messages for high voltage charging system. • Reduces drain on 12V battery. • Improves performance of charging. • Improves performance of wireless communication of the Lithium-Ion battery status • Improves performance of cabin heating and windshield defrosting system During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.
Vehicles covered
- GMC Hummer EV Pickup 2025 2025
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