2000 Chevrolet Impala, signal switch recently started making a buzzing sound no signal lights work but other warning lights appeared on dashboard?

Rapidly and forcefully turning ON // OFF the hazard light switch on dashboard a few times may help. That switch also contains the signal light flasher and a failing flasher will make a “buzzing sound” .. This is a pretty common problem with that vehicle - - IF this ON // OFF test restores signal light operations - REPLACE the hazard switch assembly.. Good luck!