I am planning on adding a sub woofer to my stock stereo. I'm not sure which wire I can use to tap into for the remote power wire on the amp. Does anyone have this info? Also, where is the stock amp located? Any other suggestions will be appreciated.

Thanks for your help

Try these links:
http://www.gp-owners.com/audio/index.html#sub
http://www.gp-owners.com/upgrades/powerwire.html
http://www.gp-owners.com/audio/index.html#general

I've got mine tapped into my power antenna wire.

In the past I have used the power antenna but I don't have one on this car.

Okay, I found the stock amp which was located on the back of the rear seat and tapped into the orange wire for my remote power.