5.3 V8 300hp Stage 1 tuning

The GMC Envoy 5.3 V8 300hp produces 300 hp and 447 Nm as standard. The YASTUNING Stage 1 remap file takes it to 320 hp and 470 Nm, a gain of +20 hp and +23 Nm. Engine code LM4. The file is checksum-corrected and reviewed by an experienced calibrator within factory component tolerances.