Thermostat is sticking.
If the temperature gauge on your 1995 Blazer with a 4.3 engine stays on hot but the vehicle is not actually overheating, it could indicate a faulty temperature sender or gauge. The sender might be providing incorrect readings, or there could be a wiring issue affecting the gauge's performance. Additionally, a stuck thermostat could cause fluctuating temperatures, but if the engine runs fine, it's likely an issue with the gauge itself. It's advisable to have the sender and gauge tested to confirm the problem.
It is for the Temperature gauge, it feels more balanced than being either side of the middle
A temperature gauge, that always read the maximum temperature, is usually not connected to the temperature sensor. The wire between the gauge and the sensor must be broken.
get a new temperature sensor.
If the gauge is reading hot and the car is running normal temperatures, the water temperature sensor needs replaced.
Test gauge function with a mechanical gauge to get actual engine temp.
could be the temperature sending unit
stop
StUck in open position
Is vehicle actually overheating? Could be a bad temperature sending unit or gauge Check temperature with a thermometer If thermostat does not open vehicle will overheat
Your check gauge light comes on if : your coolant temperature guage shows the temperature is high your oil pressure gauge shows the oil pressure is low or your fuel gauge shows the fuel tank is near empty
check the antifreeze