Quote Originally Posted by AveoGirl
As for the relay do I replace one from the site above with a stock one that will be it right?
Yes, you take your stock relay out and replace it with the one from the above site. But you only need that if you're going all LED (or partial LED) for your turn signals to keep them flashing at a normal rate.

Quote Originally Posted by Wolfman AK907
If you want the most light output and don't care about color go with 4300K. I have purple ones in mine though.
4300K is the most light output, but looks like regular bulbs, just brighter (that's what all the Caddy's use stock).
5000k is pretty close to daylight, but I personally prefer 6k, it's got very good light output, yet looks cool with just a hint of blue. And 3000k in fogs is actually practical since yellow color cuts the best through the fog/rain...

And wolf, for you it doesn't matter, it snows all year round, so it reflects any color you have