A solo vehicle crash on Highway 20 east of Clearlake Oaks on Friday killed a passenger. A Chevy van, traveling westbound, lost control in a downhill curve around 9 a.m., went over a steep embankment, and overturned. 30-year-old Gabriel Guarchaj-Ajtzalam of Modesto was ejected and died from his injuries at a trauma center. Drugs and alcohol are not suspected.