Could be your thermostat or your anti-freeze
If you temperature gauge is going up and down then you may have a problem with your sensor. You should take your car to a professional to ensure that you don't overheat your car.
Yes, because your vehicle will overheat.
The relay sensor is likely defective
mechanical engine trouble. its about to blow up.
A short in a wire or a failure of gauge or sender.
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.
It depends on what kind of car and what year. if it has cooling fans, they can be not operating.
fuel sending unit
Bad Gauge---Electrical short---Bad fuse---Bad sending unit---loose or bad electrical connector to the gauge. Bad sensor. Had a faulty gauge on my 97 Ford Ranger. I changed the thermostat and the sending unit and the temperature sensor it started wotking beautifully.
if the temperature goes up on ur gauge but it is not overheating means ur thermostat is no good
YOU NEED TO GO INTO YOUR GM DEALER AND HAVE THE SERVICE DEPARTMENT REPROGRAM THE CARS COMPUTER !