Headlights and taillights issue
 

My lights go on and off when parked and today drained my battery. Dealership said they couldn't replicate the problem. I did in 30 degree weather. I disconnected the remote start and that didn't change anything. I have drl if that helps. they work fine. alarm works. doors lock. can't figure it out. it's an 01 gran prix 3.8[:@]