GMC TrailBlazer Envoy 2003 – 2005 Engine Computer ECM PCM 12574976 4.2L
The GMC TrailBlazer Envoy 2003-2005 Engine Computer ECM PCM 12574976 4.2L is a direct replacement engine control unit (ECU) manufactured by OEM. It requires programming and has a manufacturer warranty of 1 month. This ECU is specifically designed for the 2003, 2004, and 2005 model years of the GMC TrailBlazer Envoy with a 4.2L engine. Made in the United States, this ECU is a flash memory type and is a front placement part on the vehicle. It comes with interchange part numbers such as 12584593 and 19210065 for compatibility.