Tl* the contact owns a 2011 gmc sierra 1500. the contact stated that the vehicle hesitated to start. the vehicle was started after several attempts. in addition, the roof of the vehicle was rusted. the dealer diagnosed that the fuel injector was leaking and going into the cylinder. the vehicle was repaired under warranty; however, a year and a half later, the failure recurred. the vehicle was taken to the dealer where it was diagnosed that all eight fuel injectors needed to be replaced. the vehicle was repaired, but the failure recurred a year later. the vehicle was taken back to the dealer where it received the same diagnosis. the vehicle was not repaired. the manufacturer was notified of the failures. the approximate failure mileage was 25,000. updated 09/22/16*lj updated 10/05/16.*jb