2006 Trailblazer 5.3/6.0L Engine computer 12596679 "Programmed to your VIN" ECM
Note: If this ECM is for a 2006 GTO the ECM will have to be linked to the powertrain interface module before the vehicle will start. This E.C.M. fits the following vehicles: 2006 5.3/6.0 liter Buick Ranier, GMC Envoy, Envoy XL, Chevrolet.