The buzzing is probably the door pins, take the panel off and shove some foam under each one. I cut up a shoe insole that I had laying around.
And you don't have to do any rewiring to put leds in... just 1k 1/2 watt resistors
1997-2003 Grand Prix Fog Light Switch LED Conversion Tips and Maintenance - Car Questions, Answers, and Discussion
You're welcome.. now, is that a Pokemon as your display pic?