How do you fix the gas gauge on a 1998 olds cutlass supreme?

To fix the gas gauge on a 1998 Olds Cutlass Supreme, first check the fuse related to the fuel gauge in the fuse box. If the fuse is intact, inspect the wiring and connections at the fuel sender unit located in the fuel tank, as these can corrode or become loose. If the wiring is fine, the issue may be with the fuel sender itself, which can be tested with a multimeter or replaced if faulty. Lastly, ensure the gauge on the dashboard is functioning by checking the instrument cluster connections.