I was in the same boat, wondering about using Tesla Superchargers for my EV. Turns out, you totally can! All you need is the NACS-to-CCS1 adapter that GM recommends, check your GM app for details. It’s also important to add your payment info in the app for seamless charging. Just remember, Tesla Superchargers might not hit the max speed your Hummer is capable of, but they’re a great backup or even a main option depending on your area.