Hey guys/gals. Been quite some time since I've been on around here. This is probably old fodder for alot of you but looking for some tuning advice on my 2500HD 4x4. Truck is bone stock with 205,000 on it. Engine is a 6.0 and trans was changed with a '97 4L80E with 95000 miles on it.

Looking for a decent tune job that won't bust the bank. Looking to turn on electric fans, which temperature thermostat to run,
advice on shift points, torque management, etc. Any advice would be helpful. Thanks..........