Where on a 1988 Buick Eletra would be fuel pump installed?

There is no 1988 Buick Electra. Buick did not produce a car called the "Electra" in 1988. The Electra model was discontinued after the 1987 model year. It's possible you're thinking of a different year or model.

To find the fuel pump location, you need to specify the correct year and model of Buick. Generally, in older cars like the Buick Electra (assuming you meant a different year model), the fuel pump is located within the fuel tank itself. You'll need to consult a repair manual specific to the correct year and model to be certain.