I did this on my old Lumina and changed all the bulbs to green in the dash/hvac... this site here: www.autolumination.com Tail Light Brake Light Turn Signal LED Bulbs sells the correct wedge bulbs to just swap out, and the 194bulbs, and PC-194 bases to stick 'em in (for the dash) so you don't hafta solder anything... VERY simple to do... if I had pictures still I'd post up, but it's real easy, with nice results.