Hey Ken==Check the coolant in the radiator WHEN THE ENGINE IS COLD. Sometimes the coolant recovery bottle wilpopiooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooool still have coolant but the rad low. GoodluckJoe
Thermostat may not be opening
if your temp gauge is not woking you will know it what you already said it it will boil coolant and stalled. other way around is open car hood every 3to 4 miunts of driving and look at at your over flow resvoir to see if the coolant is boiling in there. best advice is to gft this thing fix asap. if your temp gauge is not woking you will know it what you already said it it will boil coolant and stalled. other way around is open car hood every 3to 4 miunts of driving and look at at your over flow resvoir to see if the coolant is boiling in there. best advice is to gft this thing fix asap.
if it's 14-gauge then it's 14-gauge.
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.
Low Coolant or faulty gauge
This would indicate that the system is low on coolant when the gauge is hot. Not enough coolant to service the heater core.
If the temp gauge reads normal and the engine is not overheating, the thermostat is doing its job. The thermostat maintains the coolant temp by opening and closing allowing the coolant to flow or not to flow. When it is closed the coolant doesn't circulate.
any make after 1997 will be susceptible to electrical issues when engine is normal. i wish they would have left the computer stuff out of vehicles. gauge is most likely electrically impaired.
Low on coolant or a sticky thermostat, replace it.
You may have a faulty coolant level sensor
probably the coolant level sensor... Does the temprature gauge go up to hot then down to normal?
An inoperative temperature gauge will not alter how an engine runs, but the operator will not know if the water temperature has risen above normal without a properly working guage.
Because the temp gauge is not giving you the temperature of the water/steam in the radiator. You may have a bad head gasket or a cracked head causing the coolant to have that boiling effect.
Probably low on coolant. Have coolant system checked for leaks.