The Chevrolet Trailblazer SS 6.0 V8 400hp (All) produces 400bhp and 542Nm in standard form. Our Stage 1 ECU tuning file raises output to 420bhp and 565Nm, a gain of 20bhp and 23Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.