Hello, I am missing something, I have been reading this post with focus on installing a wide bad O2 for tuning.

A little more info, I am playing with 95 Chevy truck, so I am pretty sure pin 16 will be the same (for O2 data signal) as van and the zip file calls out. Now if I recall the o2 sensor is a 3 wire? 1 is power and the other ground? does the power need to plug into keyed power source? and ground just to body or is it as simple as run wires to battery with eyelets and disconnect when done?

What is benefit of AEM gauge assembly? does the gauge come with O2 sensor? why not just buy the O2 sensor, seeing the plan is to data log?

I am learning thus my questions.