Headlights problems of the 2005 Saturn VUE

I have an 05 Saturn Vue. I am having problems with the headlights switching to the daytime running lights when I am driving at night. My dash goes completely black with the only lights coming from the dash being the green headlight that indicates the daytime lights are on and the light from the odometer. When this happens I also lose my taillights making it dangerous. This has been going on for months and I have had no resolution to this from the dealer. They claim they have to see it happen in order for them to fix it. There is no pattern to when this will occur as it comes and goes intermittently.

1) purchased 2005 Saturn relay van; 2) all lights on vehicle are variable. This is at all times. It is distracting while driving at dark periods. Lights vary light output, not maintaining steady output. Saturn has acknowledged that all relays have this problem, and stated to mechanic that the alternator must be replaced. Supposed to be available 1-14,2005. 3) dealer continues to anticipate replacement alternator, but since 1-3-05, we are still waiting, with no resolve.