THE_CARNEYS

We have an 07 chevy trailblazer ls and we can be driving after dark and both of the low beam automatic headlights will turn off by themselves with no warning whatsoever.... When this happens can hit the high beams and they come on right away but if you try the low beams again but if you try the low beams again they will still be off.... Also when this happens the low beams usually stay off for a few minutes (or miles) and then come right back on.... Nebdy have ne ideaz about what could be cauzin this VERY DANGEROUS situation?????