[SpruceCaboose]

Does anyone have information on what the different codes stand for on the data tag behind the grille?

 

[Moparite]

There used to be a site that a lot of info (including this) but is no longer.

http://dodgeram.org/tech/Decoding/body_code_tag.html#10

I haven't found a replacement. This may help but doesn't list all the codes. You can get a print out form the factory with all your options depending on your year.
Body Code Plate - Dodge RAM 1500 1998 Owner's Manual [Page 4]
Here is a list of a lot of the factory codes, You can search each one on your tag.
http://starparts.chrysler.com/starlibrary/reference_docs/salescode.pdf