I've had my 58 step side 15 years and put about 200 miles a yr on it. It has all original parts and a 235 engine. The temp gauge has always worked fine. Past weekend the needle was completely off gauge to low temp side until truck warmed up to 190 degrees ( tested with temp tool) and the needle only registered about 1/4 of gauge up. Usually at 190 it would be just pat 1/2 on gauge. What gives. Any advice? Thanks I'm learning as I find issues to fix.
