Does anyone know how I would install a bench seat or two single seats in a 2003 h2. I have one seat that is in the third two but I'm needing another one. I was looking to get a set out of a Tahoe of the same year? Would they work.

 

You can't install two single seats. There's only a mount for one on the right side.
You can buy a bench from these guys: Hummer ? Cerullo Seats
Or really anyone else... That's the only way to get a bench seat in the 03-07 models.

Apparently, you can have them reverse the mounting brackets so it faces to the rear, like the H1.



GM copied the seat designs of tahoes/yukons, but modified them (seats are more plush, slightly larger), but didn't incorporate the 3rd row, 2 seat version until 08 through 09. I doubt they'd even fit in my 2009.

Now, there is one option if you're willing to do some major work on the H2, you can mount the Tahoe factor 3rd row brackets yourself (or pay someone) & then just buy the rear bench or individual seats.