Hello I'm new to the forum and HPtuners also. I just attended the tunning school that was in dallas. Anyway I have a 5.3, 3:73's NNBS RCSB 07 silverado. It was tuned by a local tuner before I attended the class. The truck feels great except for the fact that the truck doesn't get into it's powerband till about 3500 rpm. mods are, full bolt ons. Do you guys think there's something in the beta 2.3 that I could benefit from and how do I go about getting it? Also is this the upgrade that lets you see the throttle plate opening ratio? Who do I e-mail and what do I need to tell them? Thanks for any help