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July 18, 2025 Over-the-air update

This software update includes the following, if your vehicle is equipped: • Improvements to vehicle...

GMC technical service bulletin N25-250378 (V652.21) for 2024 GMC Hummer EV Pickup.

Bulletin number
N25-250378 (V652.21) (N25-250378 (V652.21))
Component
Unknown or other
Summary
This software update includes the following, if your vehicle is equipped: • Improvements to vehicle diagnostics. • Fixes to preserve battery life and improve charging. • Fixes to address issues with shifting. • Fixes for vehicle airflow in icy conditions. • Improvements to HVAC compressor performance. 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.

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