A 37-year-old Montebello woman was killed Monday in a one-vehicle crash on southbound Interstate 5 near Los Banos, the California Highway Patrol reported.
The woman was identified by the Merced County coroner's office as Josephine Rendon.
Rendon was a passenger in a 2004 Ford F-250 pickup that was traveling about 60 mph south of Highway 165.
The truck was being driven by 34-year-old Jose Serna of Los Angeles. Alvaro Velasquez, 35, also was a passenger in the truck.
The right rear tire of the truck had a tread separation, and Serna reacted by turning the truck to the left. He lost control of the truck, which spun counterclockwise and traveled across the southbound lanes. The truck then overturned in the center divider.
The victim was partially ejected and pronounced dead at the scene.
She wasn't wearing a seat belt, the CHP reported. Velasquez and Serna were unhurt.
DUI wasn't a factor in the crash, which remains under investigation.