[Mohoender]

The attached document is on the Jaguar, isn't it?

From what I had on the hummer copy the timeframe is the following:
1988: demonstration of a hummer by GM
1990's: importation of a number of hummer by Chinese companies.
2002: development of their own.
2005: validation of the project.
2007: first models entering service.

That might still work for the V2 timeline but I would think it is a bit late for the V1 timeline. Nevertheless, why not as production line can be set up by GM itself or a copy might be made earlier because of the war. A militarized Jeep Cherokee could also be found. About the Jaguar project I found that nice picture.