The Chevrolet Suburban 6.2 V8 420hp (2015 ->) produces 420bhp and 623Nm in standard form. Our Stage 1 ECU tuning file raises output to 441bhp and 657Nm, a gain of 21bhp and 34Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.