CASTAIC, Calif.—Authorities say one man died after a pickup truck he was driving plunged 400 feet down a ravine in northern Los Angeles County, but his passenger survived two nights before being found alive.

California Highway Patrol spokesman Mike Logie tells the Santa Clarita Signal (http://bit.ly/1mbrAXR) that the 39-year-old Pacoima man who was found alive Sunday—36 hours after the Friday crash—had hip and sternum injuries but was "happy to be here."

The GMC Sierra went off a winding stretch of Lake Hughes Road near Interstate 5 in Castaic, killing the 64-year-old driver.

The passenger survived in the ravine through Friday and Saturday night until another driver saw skid marks on the road Sunday morning.

The survivor was taken to a hospital.

Neither man's name has been released.

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Information from: The Signal.