Where is the fuel reset on 1989 s10?

There's no fuel "reset" button or switch on a 1989 S10 like you might find on some modern vehicles to clear fuel economy calculations. The fuel economy calculations are usually done by the computer and are not directly resettable by the driver. If you are having issues with your fuel gauge or fuel economy reading, the problem likely lies in the following:

* Fuel gauge sender unit: This unit in the fuel tank sends a signal to the gauge. A faulty sender is a common cause of inaccurate readings.

* Fuel gauge itself: The gauge in your instrument cluster could be malfunctioning.

* Computer issues (for fuel economy calculations): A problem with the vehicle's computer system could affect the fuel economy calculations, though this is less likely to simply show a wrong number and more likely to show an error code.

To address inaccuracies, you'd need to troubleshoot these components, likely with a mechanic or by using a diagnostic tool. There is no simple "reset" to fix a problem with these systems.