To find it, you'll likely need to:
* Remove the lower portion of the passenger-side dash panel. This usually involves removing screws and potentially some plastic clips. Consult a repair manual for your specific Lumina model for detailed instructions.
* Feel around the area for a small, usually square or rectangular box with a reset button. The switch might be labeled "Fuel Pump Inertia Switch" or something similar, though the label isn't always prominent.
If you can't find it easily after searching this area, refer to your owner's manual or a repair manual specific to your 1997 Chevy Lumina. A repair manual will have diagrams showing the exact location.