i have the old HPtuners module, I wish i got the pro version, as the number 1 performance tune upgrade you want to do is Improve PE tables, this is where the most bang for the buck power is hidden, close to 50hp is left on the table under PE. this is dialed down due to emmission regs by GM, 2500 truck have it turned off completly on some model years., thus why you need the live wideband O2 graphing. I wouldn't touch the timing, until you got some seat time, I would recommend tuning your transmission first.