Engine control module from 2004-2007 Cadillac CTS and 2004-2006 Cadillac SRX. This is in perfect working order. This was carefully removed from a vehicle that ran well with no check engine light on and has been tested off-car to ensure proper communication. The case and connectors have some wear from normal use, but have no broken parts. You will receive one ECM that is in similar cosmetic condition to those pictured. This item will require on-car programming, coding or flashing during installation in order to work with your vehicle. Please confirm that you or your repair facility can perform this procedure before making your purchase. Fits 2004-2007 Cadillac CTS with 2.8L or 3.6L V6 engine and 2004-2006 Cadillac SRX with 3.6L V6 engine and part number 12592124 ONLY. This will be listed as the “SERVICE NO:” on the part label. All other numbers on the part label are irrelevant.