A single-vehicle crash Saturday, April 22, has claimed the life of a Greenville teenager.  A 16-year-old  was killed when the 2008 GMC Sierra truck in which he was a passenger ran off the roadway and struck a tree.  The teen, who was not using a seat belt, was ejected and pronounced dead at the scene.  The driver of the GMC, who was also a teen, was not injured.  The crash occurred at 11:50 p.m. on Butler County 50 east of Greenville.  Nothing further is available as Alabama State Troopers continue to investigate.