The GMC Yukon 6.0 V8 329hp (2000 - 2006) produces 329bhp and 495Nm in standard form. Our Stage 1 ECU tuning file raises output to 350bhp and 515Nm, a gain of 21bhp and 20Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.