2005 Buick La Crosse daytime running lights

2005 Buick La Crosse with 32,000mi. with the 3.8l v6. Over that last few weeks, My daytime running lights have been shutting off while I'm driving and wont turn back on and while I was driving to work this morning in the dark, about 10 min into driving they shut off. I tried to turn them back on manually by switching my lights from auto to on but they won't turn back on, about 20 min later when I got to work they decided to turn back on. Every time this happens no matter what I do I cant get them to turn back on and I'm forced to use my high beams which don't seem to be affected at all by this. I'm wondering if this is a computer problem. I don't think its a fuse because they go on and off and I checked the fuses and their all fine.