Officials said Lane's body was found Thursday in a Woodland Hills hotel. The cause and circumstances surrounding his death have not been released.
Lane joined Warrant in 1984 and wrote such hits as "Heaven," "Down Boys" and "Cherry Pie."
His long blond hair and tight leather outfits embodied the excess of 1980s metal rock bands.
In recent years, he appeared in VH1's "Celebrity Fit Club" and made news for a drunken driving arrest.
Lane is survived by two daughters from two previous marriages.
The Associated Press contributed to this report.