03 CHEVY SILVERADO 5.3L ECU ECM PCM ENGINE MODULE COMPUTER 12580789 HAS COM OEM

Part Number 12580789 - You must match these exactly! Hardware No: 12580786 Service No: 12582605 Tech Notes ECU tested and does have communication and a properly functioning processor! All 8 injectors tested good, IA heater relay tested, FICM relay control, EGR function, Fuel pressure regulator and more!! Fitment/Interchange You must match your part number exactly as seen above. If any numbers are off compared to your original it will not work properly. Ecu will require programming or coding to your vehicle or vehicle's security system and is not plug and play. Ecu will fit 2003 GM Chevy Silverado 5.3L gas models with an exact part number match. Item Condition Pins perfect, none are broken or bent Warranty This ECM comes with a 90 day warranty from the date of purchase. Please keep a copy of your purchase record which we will send with your item.