Where does this wire go to and what does it do

[Marcomsi]

 

[stormsedge]

Idk. My GT doesn’t have it. Looks like it may have been someone’s add on at some point. If it goes through the rubber firewall boot, trace it under the dash…if it goes down and runs under the car, trace it there. Happy hunting.

 

[LILCBRA]

Honestly, it looks like an aftermarket heavy gauge wire used to power an amp.

 

[Noobz347]

Or an abandoned battery relocation wire.