Whrere do you runa power wire from the engine to the car? I know how to install everything else i just dont see the firewall to where i could run the extra power wire

 

The GS has two big groomets that have a bunch of wires going thru them on the driver side and on the passenger side. You can poke a whole on the grommet and run your power cable thru. On the passenger side it's a little more tight so you can use a hanger to assist.

 

yeah i saw rmmgs4 did his audio install and that's how he did it. you can still run a pretty thick wire through it