19-21 SILVERADO 1500 5.3L PCM ECU ECM ENGINE COMPUTER 12711803 12711852 TESTED Climate Controls 7L3A-12A650-FAC

7L3A-12A650-FAC

Service NO: 12616889 and Part Number: 12635821 - Please match both of these

The VIN programming process is pretty simple and allows you to install a replacement ECU without your dealer

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19-21 SILVERADO 1500 5.3L PCM ECU ECM ENGINE COMPUTER 12711803 12711852 TESTED Climate Controls 7L3A-12A650-FACPart Number Service NO: 12711852 and Part Number: 12711803 Please match both of these! ECU has security and requires programming before installation. We offer FREE VIN programming so the ECU arrives and your vehicle will start once a key relearn process is completed. We will send instructions on how to complete this. During chekcout, be sure to put your VIN in the "notes to seller" field, otherwise we'll message after the purchase for your VIN. A