I have an 08 z71 1500 and all 4 actuators have been replaced twice. Now as of yesterday i have three of them starting to stick yet again and not wanting to work. I had an 05 superduty i traded for this truck and with 180k miles on it and not one issue ever. This silverado i have has been through two batteries, 8 lock actuators and 1 electric brake controller. The only thing i can say good about it is the ride. Im very dissapointed in the chevrolet product and me personally will be returning to ford when the time is right. This truck has put a real bad taste in my mouth as far as there ever being another chevrolet product here.