How do you fix temperature gauge on a 2001 savana?

To fix the temperature gauge on a 2001 GMC Savana, start by checking the coolant level and ensuring there are no leaks in the cooling system. Next, inspect the wiring and connections to the temperature sending unit for any damage or corrosion. If the wiring is intact, you may need to replace the temperature sending unit itself or the gauge cluster if the issue persists. Finally, consider using an OBD-II scanner to check for any diagnostic trouble codes that might indicate an underlying issue.