14 15 16 SIERRA SILVERADO PCM ECU ECM ENGINE COMPUTER OEM 12663391 SN 12656993 GM ABS VIDEO 5135696AA 5140003AA 5142780AA A6111536279 A6111536379

5135696AA 5140003AA 5142780AA A6111536279 A6111536379 A6121530679 A6121535879 A6461506372 A6461506378 A6461507691 A6471531079 A6471532479 A6471532579 A6471532679 A6471532779 A6471532879  A6421505372

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We recommend matching the following but believe your MB shop can update this: A 272 150 00 79

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14 15 16 SIERRA SILVERADO PCM ECU ECM ENGINE COMPUTER OEM 12663391 SN 12656993 GM ABS VIDEO 5135696AA 5140003AA 5142780AA A6111536279 A6111536379Part Number Service NO: 12656993 and Part Number: 12663391 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