Levy, former coach of the Kansas City Chiefs, promised to bring "a sense of organization" to the Bills, 2-7 this season. He is the team's third coach in the past 13 months.
Levy, 57, who worked as an analyst on Buffalo's exhibition telecasts for the past four years, said he received a multiyear contract. He had a 31-42 record from 1978-82 with Kansas City.
Bullough, 52, who was criticized for not better utilizing $8-million quarterback Jim Kelly's passing abilities, was hired Oct. 1, 1985, after former coach Kay Stephenson's team started the season with four straight losses. Bullough coached the team to a 4-17 record.