Noob here,

looking for some general gains in a 2007 tahoe 5.3, i've heard reports of 30-40 hp with basic tunes.

I'm pretty handy and would prefer to retain as much control as possible, so my question is, if I buy the V2 scanner, do people here help with tunes/analysis (not sure if this is allowed since efilive sells tunes also).

Is 30-40 hp reasonable from tuning only (would prefer to not do intake/exhaust because i'm old and been there done that and actually perfer a nice silent drive, lol).

Thanks!