Not to keep the hyjack of the thread going but to remove the orange reflector inside the light, heat the light up in the oven (low heat for 5 mintues at a time (if that)) keep checking to see if you can pry the lights apart, once you have them apart, you'll need to stick the piece with the reflector back in to soften it's glue up, pull it out and pry it from it's location. Clean up the lenses (the mating surface of the lense and the housing) and re-silicone the two back together. I'd use some of the quick clamps that you can get at an hardware store to hold the lenses together while the silicone dries. Check for water leaks around the edges that you siliconed and then you're done.
Follow this thread
http://www.tahoeyukonforum.com/forum/showthread.php?t=6501
Follow this thread
http://www.tahoeyukonforum.com/forum/showthread.php?t=6501