the 10090k thread about water under the carpet ;-)
 

So we got some rain today and notice water under the driver side carpet and after looking for a posible leak i think i know where the water is coming from but the question is where is it coming in from???http://i59.tinypic.com/24lpjxf.jpg
Not too long ago i sealed the 2 outer front marker lights .
I want to order new ones but dont know where to order from ??....

I bought mine from the GMC dealer for ~$110 each or so. Comes with everything...

You can buy new gaskets for the bottom of the light housings on Ebay. Unless the housing is completely cracked or broken you could just try those.

You need the rubber plug too...