It happened early Friday, just after midnight. Officers got a call about a shooting on the westbound 10 near Santa Anita Avenue.
The victim drove to the nearby Los Angeles County Sheriff's Temple City station. Investigators saw a Honda Odyssey there that had been damaged, with a hole in the passenger's side window and shattered glass. They determined that someone had shot BB pellets at the vehicle.
No injuries were reported. The CHP is looking for a vehicle for now only described as a dark-colored SUV.
Anyone with information is asked to contact the CHP at (323)980-4600 or after hours at (323)259-3200.