'04 head unit into a '99?

[NYZ71]

Is that possible? I'd like to have the 6cd in dash head unit. I like the factory look, not the aftermarket flashy stuff. Will the '04 units fit in the '99 (nbs) and more importantly will it work? Thanks a lot.

[Nick]

Nope, 04's are double DIN and have the class 2 data bus.

[Joe]

Moved up a level :ehcapt:

[GmcGuy]

Dash is also A different hight for the opening. It's about a Inch taller. and the Build in data bus.