So after further investigation, the owner of this truck says that the dealer he bought it from put the ground effects, front and rear clips and a cat - back exhaust as part of a SS conversion kit offered through the gm accessories catalogue. I went on the site when i got home and sure enough the ground effects are on there? The thing has a 6.2 with the manual shift buttons on the gearshift. Its pretty pimp. I dunno why gm just doesnt roll this outta the factory?