I did mine. I ran the wire up the few inches to the top of the windshield where it meets the headliner. I then tucked it gently under the headliner to the left, and down the driver'* side a-pillar. I just tucked it in there, if it'* loose, wrap black electrical tape (sticky side out) to give it some diameter and stickyness. I then ran it down on the inside of the door jamb type thing. It'* hard to describe, but when you get to the bottom of the a-pillar, just go down. Then I used add-a-circuit (google it, available at autozone and stuff), used a 3(?) amp fuse, and fused it on the radio fuse. once that is all wired up, turn the car to ign/accessory, and touch the bare lead of the ground wire to screws and bolts under where your feet are. when the detector turns on, you have found a good ground. Mine was (I beleive) to the left of the brake pedal, up towards the firewall side. Good luck!
2001 Grand Prix GTP Special Edition
1997 Bonneville SLE- Totalled
August 2004-March 2007