I was reading
here that the H2 will indeed have a manual setting for shifting gears via buttons on the shifter.
"A new six-speed Hydra-Matic 6L80 RWD electronically controlled automatic transmission backs the 6.2L engine. The six-speed automatic has a wide, 6.04:1 overall ratio ? including two overdrive gears ? that helps deliver an excellent balance of performance and fuel economy. Also, the 6L80 has a "tap up/tap down" capability that allows the driver to manually select upshifts and downshifts with a button on the column shifter."
That sounds pretty cool. I'm not sure how much I would use it other than offroad, though.