12-16 GM CHEVY SILVERADO SIERRA ECU ECM PCM ENGINE COMPUTER 12703878 12703872 Climate Controls 68239938AB

12-16 GM CHEVY SILVERADO SIERRA ECU ECM PCM ENGINE COMPUTER 12703878 12703872 Climate Controls 68239938ABPart Number 12703878 12703872 Service NO: 12703872 Software NO: 12703878 You must match both of these! Fitment Interchange You must match your part numbers exactly as seen above all the way through. 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 various GM 5. 3 6. 2 models with exact part numbers

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