4.2i 279hp Stage 1 tuning

The Chevrolet Trailblazer 4.2i 279hp produces 279 hp and 373 Nm as standard. The YASTUNING Stage 1 remap file takes it to 300 hp and 395 Nm, a gain of +21 hp and +22 Nm. Engine code LL8. ECU: Delco E67. The file is checksum-corrected and reviewed by an experienced calibrator within factory component tolerances.