The GMC Safari 4.3i - 190hp (2001 - 2005) produces 190bhp and 339Nm in standard form. Our Stage 1 ECU tuning file raises output to 210bhp and 360Nm, a gain of 20bhp and 21Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.