Where is the washer pump on a 1989 Buick Riviera?

The washer pump on a 1989 Buick Riviera is located in the front of the vehicle, behind the bumper. More specifically, it's usually in the wheel well, either the driver's side or passenger's side. You'll likely need to remove some components to access it – possibly a splash shield or some plastic trim pieces. A repair manual specific to that year and model will give the most precise location and removal instructions.