OER Parts offers a wide selection of Body Panels for your 1987 GMC R3500. OER Parts offers 1987 GMC R3500 Truck Bed Components, 1987 GMC R3500 Stepside Bed Sides - Full, 1987 GMC R3500 Bed Sides - Partial, 1987 GMC R3500 Running Boards, 1987 GMC R3500 Side Steps, 1987 GMC R3500 Patch Panels, 1987 GMC R3500 Front Bed Panel, 1987 GMC R3500 Stake Pocket Repair Panel, 1987 GMC R3500 Bed Floor Panel, 1987 GMC R3500 Stepside Rear Fender, 1987 GMC R3500 Fiberglass Bed Side, and 1987 GMC R3500 Rear Bed Corner.