I just installed a Pioneer AVIC-F900BT in my '04 GTO (A4). The sound quality is amazing, paired with Pioneer speakers. One of the wires that is part of the install is the Vehicle Speed Sensor wire. I didn't have a clue where this was located, so I left it off. The nav is working just fine without it, but I'm not sure what functionality I am missing.

I was just wondering if anyone knew where the Vehicle Speed Sensor wire is on the '04 GTO? Any input would be appreciated! These cars have awesome interior designs. The door disassembles and reassembles super easily and no crappy clips to worry about.

THANKS!

Nevermind, I found the details here:

http://www.ls1gto.com/forums/showthread.php?t=225409