2004 Ram 1500 (submodel: Laramie, SLT, ST) New Body Style, For Radiators with Filler Neck. 2005 Ram 2500 (submodel: Laramie, SLT, ST) GAS Engine, New Body Style, For Radiators with Filler Neck. 2005 Ram 1500 (submodel: SLT, ST) GAS Engine, 4-Door, Crew Cab Pickup, New Body Style, For Radiators with Filler Neck.