can any one help me please

[trailblazerss/gto]

i have a 05 gto ls2 at
and a trailblazerss with k&n cold air kit i have a programmer but i just dont feel any thing should i
im only using it one car at a time i no that it only be for one app but im not seeing or feeling any thing i went to my speed shop where i bought it from and i hate to say it he wasnt much help so if any one can help it shure would be great i love my ss and gto but i shure would like to see some thing any thing thanks agin for any help u may be able to give

[mikel]

The TBSS is a much heavier vehicle, so it may be tough to feel all of the power gains there.
In the GTO I generally hear great feedback from users of A4 and M6 vehicles, all reporting at least a loss of traction.
Are you using good quality 91 or 93 octane fuel, and the appropriate tune?

Thanks