2005 Buick La Crosse

Electrical problem
2005 Buick La Crosse 6 cyl Two Wheel Drive Automatic 90,000 miles

My low beam headlights will click and cut off while driving. I can switch to high beams and continue to drive. My system is an auto light system that turns on low beams at dusk. The bulbs have been replaced once and the system appears to operate normally the next day. Any history or ideas?
Charles Reynolds
September 23, 2010.

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