To call the new Yukon's interior an improvement over the previous model is to engage in a considerable amount of understatement. It's not that the last Yukon's cabin was poorly executed, but rather that the new one is close to brilliant.
Leather upholstery, particularly in Denali models, ascends to luxury territory, while the real aluminum and wood trim makes a further claim to luxury status. Even in less-optioned models, overall fit and finish of the cabin is solid and tidy.
A great deal of effort went into quieting the cabin of the new Yukon, from special exterior design concerns to available active noise cancellation; even with the electronic aids, however, the cabin of the Yukon is quiet, allowing easy conversations at normal indoor volumes.
The second-row gains noticeable leg room in the 2015 Yukon, while the door opening is slightly larger, making access easier. The third-row area remains somewhat compromised, with very little rise and, in standard wheelbase versions, very little leg room. The Yukon XL improves third-row leg room substantially, but the seats are still best reserved for children or smaller adults.
Cargo and payload capacity are both very good, as you'd expect of a truck-based full-size SUV. Yukon XL models offer a huge rear cargo bay with 38.9 cubic feet behind the third row, 76.7 cubic feet behind the second row, and 121.1 cubic feet behind the first row. The standard-wheelbase Yukon still offers plenty of space, however, with 15.3 cubic feet behind third row, 57.6 cubic feet behind second row, and up to 94.7 cubic feet behind the front row.