2006 Grand Prix, I had an issue about a year and a half ago ( July 2009 ), I started the car, it was dark out , in a lighted parking lock. High beams only would work , both flash pass mode and on high beams. Turned off ignition and restarted several times, same issue, drove home with high beams. Next day the lights operated fine. 2-3 weeks ago, driving in dark out after 25 minutes low beams shut off , I pulled over turned off the ignition and restarted. They turned back on and continued to operate normally. This week , driving in the morning, just before dawn, after 40 minutes the low beams shut off ( high beams worked ), I drove to work ( no head lights, but with parking and tail lights ), an hour later I started the car ( was light out now ) , no low beams, I put the car in drive , no day time driving lights either , manually turned on lights still no low beams, high beams in flash pass and on high beams worked fine. 3 Hours later I have driving lights again and low beams again in manual mode. I did over ride the auto mode and turned it on manually , the low beams still did not turn on. I also pulled out the low beam relay under the hood and plugged it back in, it didn't do anything to turn the low's on. Thanks for your help !