im lost need more than help

[grayballz56]

i have a 2000 gmc c2500 with 5.7 installed headers removed egr and cats .im trying to figure out how to tune it but dont no what bin or xdf file to start with ive read everythung just not understanding i guess please help!

[ralmo94]

Computer should be under hood left side. What is the service number on it?
It should have what they call a black box vortec computer.
Not sure if there is open source definitions for them?
Hp tuners supports them.
You could swap in a 1220411 and use tunnerpro