paint codes

I looked all over my car for the paint codes, but cant find anything. I looked on both doors, glove box, under the hood, trunk, etc. all the GM listed places. Anyway, does anyone know the paint code for the Sunset Orange Metallic?

Sherwin Williams (http://www.sherwin-automotive.com/formula/car_finder.cfm) lists it as WA633H.

633h.