The GMC Sonoma 4.3 V6 195hp (1997 - 2004) produces 195bhp and 352Nm in standard form. Our Stage 1 ECU tuning file raises output to 215bhp and 375Nm, a gain of 20bhp and 23Nm, with no hardware modifications required. The file is delivered through the ByteFLASH portal and is ready to write to the vehicle.