GMC Hummer EV Defrost Mode Explained (Cold Weather Test)Hummer Defrost Test

In cold weather, windshield fogging and defrost performance matter — especially in a tech-heavy vehicle like the GMC Hummer EV. In this video, I explain how Defrost Mode works in the Hummer EV, why there is no traditional defrost button, and how the system behaves in real winter conditions. This is a real-world cold-weather test, not a manual walkthrough. What I cover: - How to activate defrost in the Hummer EV - Why GMC uses an automatic climate strategy - Fan speed, airflow, and temperature behavior - Windshield clearing performance - Real-world usability in cold conditions - What surprised me (and what didn’t) This video is for current owners and anyone considering the Hummer EV who wants to understand how its climate system actually works when temperatures drop. Drop your cold-weather questions in the comments — I’ll test them.