it is 100% for the twilight sentinel option. All the cars had the pigtail for that option just not all cars have the option installed. If you pulled the bezel around the gauges you'll notice and opening next to the interior light dimmer switch. That is where a second dimmer switch would be located for the twilight sentinal option. The pigtail you're asking about plugs into the amplifier for it right behind the glove box. Open the glove box and you might have the box back there. I was delighted to find mine had all the pieces for that option minus the dimmer switch. In order to add this option all you need to do is add that second dimmer switch, the new applique with the twilight sentinel opening, the amplifier box, and the photo eye on the dash. Here's my same pig tail in my car that goes to the amplifier box. Hth
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