VEHICLE WAS STRUCK BY A MOTORCYCLE TRAVELING AROUND 50MPH IN THE DRIVERS SIDE FRONT TIRE. THIS IS A 4 WHEEL DRIVE VEHICLE. THE MOTORCYCLE WAS ONLY A 50CC MODEL SMALL MOTORCYCLE. THIS RESULTED IN THE SPINDLE BREAKING IN TWO AT THE POINT JUST BEHIND WHERE THE TIE ROD END CONNECTS RESULTING IN A LOSS OF STEERING ON THAT WHEEL. LUCKILY THE SILVERADO WAS ONLY TRAVELING APPROXIMATELY 25 MPH AT THE TIME OF THE ACCIDENT AND WAS SAFELY STOPPED IN A SHORT DISTANCE. THIS IS A HEAVY DUTY PART AND SHOULD NOT HAVE BROKEN. THE TIE ROD SHOULD HAVE BROKEN FIRST. *TR