Equinox 2005 3.4L Engine Computer PCM ECM 12581598 / 12591856 – Programmed 2 VIN
For use in vehicle originally equipped with SERV NO 12581598 or 12591856. GM installed this 12581598 / 12591856 PCM in the above application as well as several other GM models. This was possible because each of these models received their specific programming from the factory.