Koyo leads the radiator industry in quality, performance and fitment. Koyo engineers carefully design the radiators offering a true plug and play installation No drilling, cutting, relocating, or stretching to get their radiators to fit properly.These OEM Koyo replacement radiators feature plastic end tanks with a aluminum core, allowing for a cost effective option compared to the OEM units. Fits 96-99 GMC SIERRA 4.3L V6 AT 96-99 GMC SIERRA 5.0L V8 AT 96-99 GMC SIERRA 5.0L V8 MT