I was changing the bulbs in my 00ss(apparently they only last 60k, changed the other side last week) and I noticed that I have these little lights on the outsides of the assembly, what are they. On each assembly there is a brake/tailight, reverse light, turn indicator. But the other light is way smaller in size.

 

My Camaro's a '95, but if we're talking about the same light, it's towards the quarter panel, and it's there to light up the edge of the taillight so that it all illuminates at night.

 

running light/side marker

 

mine must be burnt out