The Chevrolet Uplander 3.5 V6 203hp (2007 - 2009) produces 203bhp and 298Nm in standard form. Our Stage 1 ECU tuning file raises output to 230bhp and 330Nm, a gain of 27bhp and 32Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.