06 2500HD wheel stud size?

i just picked up a 06 2500hd 4x4 duramax crew cab with 18x10 pro comp wheels. bad thing is there are 3 wheel studs on each side of the rear axle that are missing lug nuts due to stripped threads. any one know the stud size and where to pick them up at?

As far as I know, all of the lug nuts used on the half and 3/4 ton GM trucks are the same. I'd just visit an auto parts store... Or your GM parts counter. :)

Jim