The Temperature gauge on my 1996 silverado keeps bouncing around from all the way hot to normal operating range. When this first started I filled the radiator with coolant, Temp gauge keeps bouncing from all the way hot to normal operating range. When this first started I changed the thermostat, that did not fix the problem.
I went to the local parts store to get a temperature sending unit, but they said that there was not one listed for a 1996 silverado 5.7 four wheel drive. Where is the temperature sending unit located on this vehicle?