Tl*the contact owns a 2008 chevrolet express van. the contact was driving and came across a dark road. the contact was forced to use the high beams and when they were turned on, they caused all of the exterior lights to fail. the contact turned the headlights on and off, but the high beams no longer worked. the dealer inspected the vehicle and stated that both light bulbs failed. the contact was concerned about the failure since they were able to use the low beams. the low beam head lights and high beam head lights were identical and the failure occurred in both. the failure mileage and current mileages were 37405.