This is a prototype that was recently seen and photographed at the Louisville RV show.
Photos courtesy of screen name, "Hitchhiker".
He's an Admin at the RV Forum: irv2.com
Thanks for the photos
4.5 Liter Duramax Diesel
Chevrolet Suburban 2500 4x4 Duramax Diesel 4.5 Liter
GMC Yukon XL 2500 4x4
Pete Moore Chevrolet