Differences between 03-07 and 08-09

[Indy]

99.99% of all people can't tell the difference of an 08+ or an 03-07. The main change was the engine-tranny and the interior. Those you can't upgrade to, unless you want to spend some serious money. Personally, I like the more rugged style of the 03-07 interior. It is more suitable for a Hummer, more rugged. They should have upgraded the materials on 08 but kept the more classic look inside. If you want to spend 2x the money for a better engine and transmission and like a more Escalade interior, by all means go for the newer one. If you want to save some money and don't mind "only" 320 hp and a more classic interior, nothing wrong with the 03-07 models.