The turn signal flasher unit on a 2000 Chevy Malibu is typically located
under the dashboard, near the steering column. However, the exact location can vary slightly depending on the trim level and specific options. It's often behind a small access panel. You might need to remove some trim pieces to access it.
A repair manual specific to your 2000 Chevy Malibu will be the most accurate source to confirm its location. Otherwise, you might need to do some careful searching in that area under the dash.