Thanks all for feedback.I want to keep the running boards for a 1 ton pickup bed I might buy.The flatbed is 10',but I meant it was installed by some independent company,not GM.Only the Cab and Chassis came from GM as model number (GS).Maybe it got sold off the dealer lot with long running boards and not ordered by someone this way.I`m just curious why someone(if the case) would want long running boards if they are going to fit a flatbed on it.I`m leaning more towards on dealer lot because it could be sold to have a body style put on that could use the long boards?I love to ponder the past(Stovebolter Forever)