12573576 ecm ecu computer 2003-2005 Chevy Trailblazer or GMC Envoy *Tested*

2007-2009 GMC Envoy 5.3L ECM Engine Control Unit ECU 12603530 OEM 978s2b2b3-QT

2003-2005 Chevy Trailblazer Engine Computer Control Module ECM ECU PCM 12574976

2007 GMC Envoy Engine Control Module ECU ECM 12613427 (stock #312)

07-09 GMC Envoy 4.2L ECM ECU Electronic Control Module Unit OEM 12607096

2003 2004 2005 GMC Envoy 4.2L Engine Control Module Unit ECM ECU 12573576 OEM

2003-2005 GMC Envoy XL ECU ECM Engine Control Module #2929

2003 2004 2005 GMC Envoy 4.2 Engine Control Module Unit ECM ECU OEM 12573576