My low beam headlight go out for 10 seconds. on 2007 Buick LaCrosse

All other lighting has not been affected, and the low beams go out I use my high beams until the low beams come back on, and then it stays on. This has been going on for the past three days and only once at night and nothing during the daytime. No messagees appear in my display window. What is going on and how big of a problem is it?

Asked by for the 2007 Buick LaCrosse