I have the same problem but a 2006 pontiac torrent. There is a service bulletin out for this issue 07-08-42-002A. Just do a google search, plenty of results if you miss the those lights. Just have to replace the resistor. Here is a good description.
we replaced the resistor and the relay,the drl lights wored fine then decided to quit...resistor was definiely bad glad w replaced but didnt fix the problem.we did replace headlights about 2 weeks before drl quit could this have anything to do with it??We put in sylvania xtravision 9007.thank you for yor time and response appreciated.