Used Engine Control Module (ECM) fits: 2003 Chevrolet Trailblazer ext Electronic
The eng ine types may include 4.2L 256Cu. l6 GAS DOHC Naturally Aspirated,5.3L 5328CC 325Cu. V8 GAS OHV Naturally Aspirated. This part fits vehicles made in the following years 2003,2004,2005,2006.