Hello I am new here. I have an 03 Trailblazer in fantastic condition. I just got a set of running boards for it, but, I am not 100% positive they will fit. Does anyone know the exact length between the 2 mounting holes on either side? Also, I believe the holes are set at 4mm's? Can anyone verify that for me? I need to go purchase bolts, washers and nuts. I would also need to purchase some extra material in the length between holes is different from the hole length on the boards I have. Thank you for any help!!!