I don't mean to sound snarky or rude, but Please BEWARE of the "Genuine GM" emblems sold by SOME other sellers that are Chinese reproductions and of INFERIOR quality; if there is no GM part number on the back, it is most certainly NOT a GM part.  I would just hate to see ANY Caprice fan waste good money on a product that simply doesn't even meet appearance standards.    

This is a new, never installed and ORIGINAL GM tail light emblem; I believe these were used on the 77-79 Caprice models and an example of these installed is shown in the 1st photo.  They are new, Genuine GM and are perfect with ZERO wear or fading; since I do not have the GM packaging, I just wanted to point this out.  If you are not 100% satisfied, I will accept a return with NO questions asked!!! This is solid metal with three pins and if you are using these for custom application, it measurers 2.5 inches across (at the widest part, the "tips" and 3/4" tall at the tallest (right in the center). AT THE TIME OF LISTING, I have two on-hand-if you need more or want more let me know and I can gather them from my warehouse!