The GMC Terrain 2.0T 252hp (2017 - 2020) produces 252bhp and 353Nm in standard form. Our Stage 1 ECU tuning file raises output to 300bhp and 450Nm, a gain of 48bhp and 97Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.