Size of rear hatch opening

[macedachelsea]

Hello, we are looking into purchasing a vehicle that will fit the quite monstrous large Gunner Kennel. Could anyone tell me the height of the rear opening? I’m not sure if this varies by year, but we are interested in a 2013 that is currently in the market. I’m also interested to know if the third row folds flat to the ground and/or if it is removable, or does this vary by model? Thank you in advance! It’s been challenging with trips to multiple dealerships to find out if SUVs of interest are not big enough to accommodate. We’re hoping the Tahoe will fit the bill.