Firmware for the car Chevrolet Tahoe b
engine: 5.3 petrol,
control unit: ACDelco E38,
software version: 12640918 12640855 12640881 12647991,
the firmware disabled the control of catalysts (Euro 2), EVAP tank ventilation and made chip tuning with an increase in power and torque by 10%. You can remove the connectors from the lower oxygen sensors.
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