How do you fix a stuck gas gauge on a 1990 Toyota sr5 pickup?

To fix a stuck gas gauge on a 1990 Toyota SR5 pickup, first check the fuel level sender unit in the gas tank for faults, as it may be stuck or malfunctioning. You can access it by removing the fuel tank access panel or dropping the tank. If the sender appears to be working, inspect the wiring and connections for damage or corrosion. If everything seems functional but the gauge is still stuck, consider replacing the gauge itself or the instrument cluster.