Fits 2004 Chevrolet Silverado 2500, ECU/ECM, OEM:12586242, VIN:1GCHK23U84F140159

1999-2006 Chevrolet Silverado Engine Computer ECU ECM 12586242 YFXL 12583660

2003-2006 Chevrolet Silverado 1500 Engine Control Module ECU ECM 12586242 OEM

2003-2006 CHEVY SILVERADO 2500 GMC SIERRA ECM ENGINE COMPUTER 12586242 YCTJ

Engine ECM Electronic Control Module ID 12586242 Fits 04 AVALANCHE 1500 2226259

Engine ECM Electronic Control Module ID 12586242 Fits 04 AVALANCHE 1500 2220376

Engine ECM Electronic Control Module ID 12586242 Fits 04 AVALANCHE 1500 2016449

Engine ECM Electronic Control Module ID 12586242 Fits 04 AVALANCHE 1500 1342217