I have the exact same problem with my 2001 GC. But no solutions so far. Have had it into dealer and other reliable mechanics about 5 times now. Dealer tried replacing light switch and front end module to no avail. They next want to try replacing the main computer, but it's a shot in the dark.
I do a fair amount of long distance driving. Oddly, three times now, I've noticed that both headlights went on after I've driving a few hundred miles, and twice when I turned on the rear wiper.
If you've solved your problem, I'd love to hear how.
thanks.
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