I took pictures at Barrett Jackson and posted them here already:

GMC Hummer EV at Barrett-Jackson
TFL is at Barrett-Jackson in Arizona and got some footage of the Hummer that's going to be on the auction block. Looks like the Hummer won't be the only VIN #1 being auctioned off for charity. The video also shows Barret-Jackson will auction Ram TRX #001, Mustang Mach 1 #001, and Bronco #001...
My dealership is Yates GMC in Goodyear, AZ and the latest they heard is November for having their demo.