In case that's you, PickupTruck.Com speculates that the coming H2T (the new name for the H2 SUT, to bring it in line with H3T naming) could be offered with a diesel.

Engine power for the 1998 HUMMER offered a choice of diesel powerplants. A maximum 430 pound-feet of ... the HUMMER brand expanded to include a citizen-focused model called the H2. Following the 2001 ...

The 2008 Hummer H2, with its 6-foot 7-inch height and 6,614-pound curb weight, makes an impression wherever it shows up, and you're not likely to encounter three other H2s at the local neighborhood ...