2015 L83 Stand Alone

[oreobadr]

Team,

I just bought a 2015 L83 (5.3l) and will be attempting to get it running pretty soon. I have a couple of concerns,

1. Do I need to run a PWM fuel setup or can I just run a return line ?
2. Do I need sensor inputs for vehicle speed to the ECM?
3. What needs to be turned off or disabled in the tune so I can run this setup on an engine stand?

Any other advice?

Thanks!

[oreobadr]

Also, does anyone have a stock l83 tune for a 2015 Sierra that I could have?

[GMPX]

Did it come with the ECM ?

[oreobadr]

Did it come with the ECM ?

No it did not. The guy lost it when he moved from his old to new house.