Any one else have this issue pop up? It's happened on my GXP a few times and now my 09 impala is doing it too. Random headlights shutting off (but not the fogs on my gxp) and random back on sometime later. Sometimes weeks or months between occurances. Still has the 'flash the brights' feature but no headlights.
Wierd.

 

THe HDM module has a recall out for it, other then that, could be the ambient light sensor.