Has your car been tuned? If so, you need to get your $ back, they didn't do the whole job. Drilling is the hack method of either adjusting the IAC or ETC idle air amounts.
But, if it's given you the result desired, mo power to you.
This is true. Not as many tools on HPT for LS2. Ive had 2 different tuners try with the idle......adding timing....a tweak here, a tweak there. Even tried the fuel (I think) tables for an LS2 truck. There was some time put into this, but it just would not stop the idle surge. Mine may be just the one oddball with an attitude that refuses to learn. I have no complaints with my tuner...he knows what he is doing. Im glad he took the time and made every effort to aviod having to drill the TP. Barbaric as it may seem to some, its nothing new....nor is it uncommon. In this mad crazy world of auto performance....sometimes its just a matter of what works.