1.are 2000 Express rear doors interchangeable w/ 2004 doors?
2.beside the inertia trim is the actual door the same on cargos and conversions?
3.do cargo rear windows open like conversions do?

my car has a couple options lable on driver door which included paint color codes.
4.do the 2000s and 2004 models have these options codes.

I have sean the tire size codes & weight capacity's on all GM vans however this options lable is another lable.

5.also is goldish silver kindof a dull gold on the 2000 the same as 2004?
thanks for advice

 

anyone know about the options lable for color codes?

 

Doors should bolt up fine, the swing out vent windows were an option. Power lock mechanism would have to be swapped over. No idea on paint.

 

Will side barn doors from 2003 Express and up fit the 1996 - 2002 Express vans?

 

Here again, no changes to the body, possible electrical plugs/contacts for power locks could differ.

I suspect one could swap the entire nose (hood, fenders, grille, bumper, possibly radiator support) between the two generations as long as you changed all of it out. That's the only major difference externally.