I have a 2001 4x4 Blazer and I am almost finished converting all of my dome, dash, switch and any other light I can find (including the front floor lights) to Blue LED. It is REALLY gonna look cool when completed! All I have left really is the instrument panel and gauge lights which I will be doing tonite. I know that replacement led dome lights are available out there....but if you build your own you will get a MUCH better light look wise and output wise. The only led lights I buy that are prefabricated are the push-in wedge type 194 bulbs. I found a guy on ebay selling them with a 6 led cluster. They are perfect for your map lights or floor lights. The only reason I buy them is I havent figured out how to make my own with the wedge at this point. If anyone is interested in building their own dome lights, just email me and I'll try to head you in the right direction....you do need to have a very small amount of electrical knowledge and know how to solder at least alittle.