How do you fix a speedometer on a 1991 88 olds?

To fix the speedometer on a 1991 Oldsmobile 88, first check the speedometer cable for any breaks or disconnections, as a damaged cable is a common issue. If the cable is intact, inspect the speedometer itself for any signs of malfunction or wear. You may also need to check the vehicle's vehicle speed sensor (VSS) if equipped, as a faulty sensor can affect the speedometer's accuracy. If these components are functioning properly, consider consulting a professional mechanic for further diagnosis or replacement of the speedometer unit.