03-06 TAHOE SIERRA ECU ECM PCM ENGINE MODULE COMPUTER 12589463 12589162 HAS COM GM ABS VIDEO 56041428AA Through 56041428AK

56041428AA Through 56041428AK

Cooling Relay

Lid is NOT included but you can easily swap the lid from your original onto this box

If your vehicle has PATS and is not programmed you will get a "no start"

68026713AC

03-06 TAHOE SIERRA ECU ECM PCM ENGINE MODULE COMPUTER 12589463 12589162 HAS COM GM ABS VIDEO 56041428AA Through 56041428AKPart Number 12589162 You must match these exactly! Hardware No: 12589162 Service No: 12589463 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.