OER Parts offers a wide selection of Cooling System Components for your 1990 GMC All Models. OER Parts offers 1990 GMC All Models Shroud Hardware, 1990 GMC All Models Shroud Mounting Kit, 1990 GMC All Models Lower Radiator Fan Shroud Clip, 1990 GMC All Models Upper Fan Shroud Bracket, 1990 GMC All Models Lower Fan Shroud Bracket, and 1990 GMC All Models Fan Shroud Flange Nuts.