About 10 months ago I installed HID low beam headlights on my '04 Trailblazer. All was well and good until tonight (of course I'm taking the car away for vacation TOMORROW!!) when both low beam lights went out. They didn't blow out when driving meaning they both blew as soon as they were powered on as I never saw them blow. I didn't think it was the fuse because they are on seperate fuses. I tried them anyway and it's not the fuses.I think I would have noticed if one blew out earlier (and the other just blew) but I can't be sure. Anyone have any idea's or experiences similar or better yet, a known fix? Thanks for your input.