Antenna and car wash for 2004

[MAC]

I think every automaker intentionally change one little thing on the exterior of the auto every year. When I owned a BMW or MB, I used to know the difference between each model year. At one glance of a BMW or MB on the road, I can tell instantly which year and which model it is, in some cases, which part of year that model is, European model or American model. Such as the bumper, side mirrors, turn signal, etc. Very small changes the pros and people who follow that sort of things will know. Among car-guy friends it was a competition too, I know some kids who know all the technical details.

So, let me ask you, at a glance, can you tell which Hummer is 2003 or 2004?
You and I can, the Hummer salesmen can, nobody else know.

I like the short 03 antenna, but if I own a 04, I wouldn't mind the long antenna, it is neat. Can I add one to my 03 Hummer just for the look?