Hello all! I have a 2003 Sierra 1500 4.8, some minor modifications, but looking into tuning it mainly because I find it interesting (if a little nerve racking) and want to potentially pick up a new hobby and knowledge. A little extra performance never hurts either lol.

If all goes well my brother is doing an LS engine swap in the next month or two, and we might take a stab at tuning it as well.
Been doing a fair bit of reading, watching vids, and bought an OBDX Pro today. Hopefully all goes well!