Can any one confirm if my truck looks like it already had the big 3 done or is it still oem

 

Looks like it does

 

I don't think so

 

What is the big three ?

 

For sure not your neg cable.

 

Lol it looks like a twig, I just noticed it in comparison with the other wires.

I'm fairly certain you don't have the big 3 upgraded. But have no fear, it's doable for around 50 bucks and a couple hours if that.

 

Looks like the positive to the alternator was done though might be wrong again

 

Yea I see that now. I think it may just be the tubbing.

 

If it was its def not 1/0 gauge

 

Typically people just run extra wires and leave the factory ones intact. Looking at the connectors on the links, it looks factory.