Well we got our truck out of the Chev Dealer shop this week. The total cost under warranty was $8000. They replaced all 8 injectors and both rails. And the cost of the loaner during that time was $1800 which they covered. The 4x4 is the one we rented from enterprise. Truck was 4 years and 11 months old, so under warranty. It had 38,000 miles on it. So makes us wonder how often this kind of thing happens. We bought two of these a year apart. Sorta considering extended warranty. Anybody know what that would cost? So in the shop about 4 months.