How do i turn off wifi in chevy tahoe?

I think You're asking about the Onstar WIFI hotspot in Your Chevy Tahoe If that's the case, there are a couple things You can do. Have You installed the app If so, You can use that to disable it, which seems counter-intuitive, since when You do, You'll lose sync with Your vehicle. Alternatively, You can actually go to Onstar's website to disable it there as well. In the vehicle itself, use the touchscreen to navigate to the Onstar menu item, and just disable it there; it's pretty intuitive. If You're truly paranoid, You can actually pull the fuse that Onstar and the WIFI uses, but this also is going to nuke Your bluetooth and calling functions.