The more I drive around the more I notice Silverados of all year models with a running light out. It's to the point that I'm surprised GM doesn't have a recall on it. I personally replaced 1 yesterday and both of them about 3 months ago. I've tried all types, from cheap walmart bulbs to high end Silverstars. I know my dads 2003 Duramax loses one every other month or so as well. Has anybody else noticed this problem or am I just that OCD?