4.8 V8 302hp Stage 1 tuning

The GMC Sierra 4.8 V8 302hp produces 302 hp and 414 Nm as standard. The YASTUNING Stage 1 remap file takes it to 320 hp and 435 Nm, a gain of +18 hp and +21 Nm. Engine code L20. ECU: Delco E38. The file is checksum-corrected and reviewed by an experienced calibrator within factory component tolerances.