Or you could just track down an 03-07 'radiator grille'...the lower grille that's missing in your pic. I've definitely seen at least one truck on here that had their's removed to install LED off-road lights...
It's a little expensive new:
http://parts.nalleygmc.com/showAssem...emb ly=392397
Looks good though...you shouldn't have any problem selling it. Good luck either way.