early or late model???

[Roadstar]

I guess this is one of the problems with a chat room type forum. You can't converse quick enough to restate a question before it (the question) gets all out of wack. I know I bought an '06 Hummer. My question pertains to issues with early model vehichles as opposed to later model vehichles made in the same year. The way other people were talking about it I figured there was an obvious way to determine if I had an early model '06 or a later model '06.

Thanks for all the help. hope I cleared up my question.?.