GMC Sierra For sale: Set of GM cups/hubcaps from the 90s. Standard 6-lug, rare. Very rare and new, extremely clean, original GM. Two pieces have very minor, almost unnoticeable imperfections. Price is by offer on public only. Only serious buyers who know the value of rare items should offer. Search terms: hubcaps, cups, accessories, rare, GM, Chevrolet, 80s.