I just found out that one of the engineers at my work has been tuning GM's for long time now. He is probably one of the smartest persons I know.So i trust him explicitly. He tuned another guys truck at work. Silverado 2500 ext cab. Not sure of the year.

He says he can get me 30 more ponies and 30 more ft/lbs of torque.

My question is which way would you go Custom tune or use a programmer ( hypertech/ diablosport/ etc)