A bad thermostat is one possibility.
In front of the radiator
Head gasket. Do block test for gases in coolant
on the side of the radiator
i just put in a new radiator and now temperature gauge reads high but their are no leaks
The 1999 Cadillac normal coolant temperature gauge reading should be 180 degrees. A 195 degrees thermostat could be used, causing the temperature gauge to read 195.
The symbol used on the Renault Scenic for a problem with the radiator is a thermometer. There should also be a temperature gauge on the dash that shows the current temperature of the radiator fluid.
Either your oil pressure gauge is reading low , your engine temperature gauge is reading high , or your fuel gauge is reading low so your almost out of gas
YES
Be careful there is a temperature coolant switch mounted next to the thermostat housing. I thought this was the sensor and replaced it by mistake. There is another sensor.
Broken Temp guage
220.
The temperature gauge on a Pontiac Grand Prix should typically be set within the normal operating range, which is usually between the 1/4 and 3/4 marks on the gauge. Ideally, the needle should rest around the midpoint when the engine is at operating temperature. If the gauge is consistently reading above or below this range, it may indicate a potential issue with the cooling system or the thermostat. Always refer to the owner's manual for specific guidelines related to your model year.