The Hybrid was a 21ft box/approximately 25ft total length. 9ft 6" high by 7ft 6" wide. 3400lb empty, 4100lb to 4400lb ready to camp and 5000lb gvw. The killing spec was the gear ratio in the 5.3 TB: 3.42 fuel economy/not tow worthy ratio.
look in your glove box for the RPO Codes: GT4= 3.73, or GT5= 4.10
If you see GU6 (3.42), you are stuck in popup land.
Our dealership just got in a 2005 Z71 Tahoe fully loaded with a 4.10 ratio. Killing spec on the Tahoe: 1200lb payload.
Specs are out there to make you cringe. They are never in adds, and you have to decipher the labeling either on door pillars and glovebox of GM.