The Chevrolet Tahoe 5.3 V8 380hp (2014 ->) produces 380bhp and 416Nm in standard form. Our Stage 1 ECU tuning file raises output to 400bhp and 440Nm, a gain of 20bhp and 24Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.