I just finished the same swap this weekend. My 2022 Yukon XL Denali came with vented power-fold captain chairs. My original seats were perforated leather, but the bench seat looks like the 3rd row seat.
Here are a couple of things to keep in mind:
1) The passenger seat went in with no modifications.
2) You will need to cut the carpet. The trim will not cover the he previous seat mounts.
3) You should seal the original driver side bolt holes. You will need to remove a sealer tape from the bolt holes on the RH side of the bench seat.
4) I removed too much carpet from the RH side. Do not extend the existing passenger seat hole. There should be a carpet strip 2-3 inches between seats.
5) The Denali trim next to the door does not fit with the bench seat. I had to cut the floor molding that covers the door. I also had to cut the inboard molding of that LH rail.
6) The bench seat does not have a vented seat or the electronic folding. The electrical connector is tucked under carpet.
7) The bench has 6 bolt holes. The captain chair only had 4 bolts. You should have the two extra bolts to hold the weight of the extra passenger on the bench. The middle seat belt is only attached to the bench (not the vehicle).
View attachment 423633
Overall the process was easy.
View attachment 423632