Hey just bought hp tuner pro and looking to tune my 1999 Silverado. I took out cats and added long tube headers and exhaust. Not sure really where to start but it kinda looks like I would disable torque management lean out fuel table and do something w the power enhancement I'm a way better wrench than I am w computers but it's time to learn I guess. I currently live at 5000 feet and I am wondering if someone would be willing to help