Using Post #17 of this link as a guide:

I have adjusted my IAC counts on my cammed lq9 to an avg of 50 steps, but afterwards now my TPS voltage is reading .627.

According to the how-to it should be .4 - .6 to be in proper idle cell

On my 1999 GMC Sierra 1500 with stock truck intake and ported throttle body, is there any way to adjust the tps to .6 or below without notching the screw holes for more mobility?