in need of help trying to get my truck to run better.. Had it tune by a few shops and its lacking power feels very sluggish..
I purchased hptuners to try and figure it out or just find a stock tune.. truck is basically all stock for right now its a 2017 Gmc sierra 5.3 6 speed..
2017 GMC TUNE.hpt GMC-6-10-19.hpl