Quote:
Originally Posted by fastball
Man, wouldn't it be awesome if GM decided to surprise and delight us if that was the laser for laser guided cruise control and pre-collision safety (senses as vehicle approaches object at high rate of speed, begins begins to apply brakes and then pre-tensions all seatbelts before impact)?
One of these days, we'll see GM think outside the box on something like this 
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Sounds dreadful.
I think it probably is the dimple shown in that frame pic. Otherwise, considering its placement, it's probably a thermometer for the outside temperature display; other vehicles keep them in similar places.