So I went to Utah this past week for vacation. Drove 740 miles there, drove all over the place and drove most of the way back. Got past the state line where California and Nevada meet, and made it another 103 miles when my truck broke down. Sat on the side of the road until the tow truck showed up and had to be towed to Victorville. Dropped the truck off at the dealership around midnight and went to a hotel. Showed up at the dealer and told them what happened and they took my truck off to get a diagnosis. They came back and told me that a valve spring on the number 5 cylinder went to lunch. Took them about an hour to replace it and was covered under warranty. I also had found out that I coulda recieved a free tow to a dealership instead of using insurance under warranty. So GM is gonna reimburse me the $180 I had to pay for the mileage that wasn't covered under insurance. Anyways, I got the truck fixed and runs fine now. Has anyone else ever had a valve spring break on their nnbs?