The crash happened at Seneca Avenue near Leadership High School.
Police say the victim is 19-years-old. The teen was crossing the street when she was hit, according to witnesses.
Police say the driver stayed on scene and is cooperating.
This is the truck that hit a 19-year-old girl at San Jose and Seneca Avenues in #SF. Police say she was rushed to the hospital with life threatening injuries @abc7newsbayarea pic.twitter.com/0WyejviPml— Jobina Fortson (@JobinaFortson) April 15, 2019