03-06 TAHOE SIERRA ECU ECM PCM ENGINE MODULE COMPUTER 12586242 12583660 HAS COM Featured Products You will also not find

03-06 TAHOE SIERRA ECU ECM PCM ENGINE MODULE COMPUTER 12586242 12583660 HAS COM Featured Products You will also not findPart Number 12583660 You must match these exactly! Hardware No: 12583660 Service No: 12586242 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.

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