Need help on my truck

I have a 03 Silverado ss, and its stock minus long tubes and 3" exhaust. im new to tuning and need help reading and understanding scanner and possibly help tuning truck.

Any help would be greatly appreciated

Thanks

So read some guides and do some research.....

I've found a link could you look it for me and tell me if its good info or a waist of time.
https://www.ls1.com/forums/f9/tuning...s-46733-print/

https://forum.hptuners.com/showthrea...s-Video-Guides

Reading through this would help as well. https://forum.hptuners.com/showthrea...o-and-how-to-s