On February 8, 1990, Shannon shot himself in the head with a .22 caliberrifle. Shannon's wife, Bonnie, found his body at 11:25 p.m. in their Santa Clarita, California home, 35 miles north of Los Angeles. The rifle was next to his body in the den. His widow said his death might have been related to his use of Prozac. It was reported that Shannon had been recovering from dental surgery, and that he had a cold. His final album was released after his death, titled Rock On!.
During the summer of 1990, the country band Southern Pacific covered Shannon's hit "I Go To Pieces" (also a hit in 1965 for Peter & Gordon), with the video dedicated in Shannon's memory.