OER Parts offers a wide selection of Body Panels for your 1978 GMC Caballero. OER Parts offers 1978 GMC Caballero Truck Bed Components, 1978 GMC Caballero Stepside Bed Sides - Full, 1978 GMC Caballero Bed Sides - Partial, 1978 GMC Caballero Running Boards, 1978 GMC Caballero Side Steps, 1978 GMC Caballero Patch Panels, 1978 GMC Caballero Front Bed Panel, 1978 GMC Caballero Stake Pocket Repair Panel, 1978 GMC Caballero Bed Floor Panel, 1978 GMC Caballero Stepside Rear Fender, 1978 GMC Caballero Fiberglass Bed Side, and 1978 GMC Caballero Rear Bed Corner.