Who likes SunPro gauges specifically their Temp gauge.
I don't...have one that just up and quit working. Truck was bought with aftermarket SunPro gauges, oil pressure, Amp and temp. Dash mounted. Not by choice. The sensing bulb is located in the thermostat neck just above the stat. No evidence of a break in line

Has been working for the past year. ZERO needle movement...period.
I suppose its off to the local parts house.