2004 C5 daytime running lights

Wondering if anyone else has experienced their daytime running lights (amber) going out intermittently. One side or the other on my 2004 C5 will go out for no apparent reason, then of course the signal/turn indicator won't work in the front on that side. The lamp is obviously okay. Since this has been happening to my car I have noticed a few other C5's with their's out. Dealer says they haven't heard of any out of the ordinary problem.