Question about 1999 Cadillac DeVille

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My 1999 cadillac doesnt turn on and i have to give it a jump start. then it says that my egine is overheating and says that my coolant level is low and to check my oil? but i already to it to autozone to check the battery. they told me that its my alternater so does is that why my car is overheating and the check oil comes out? please help me????

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  • Cadillac Master
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FIRST OF ALL ADD COOLANT TO RADIATOR ITS LOW.THATS WHY CAR IS OVERHEATING CHECK FOR LEAKING HOSES OR RADIATOR. ALSO YOU NEED TO ADD OIL TO BRING OIL LEVEL TO CORRECT LEVEL.HAVE THE ALTERNATOR REPLACE.BECAUSE ITS NOT CHARGING CAR BATTERY.CAUSING THE CAR NOT TO START.

Posted on Oct 06, 2009

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1 Answer

2000 cadillac deville is overheating, replaced thermostat: water pump radiator had head gaskets fixed it's saying check coolant level and it spews coolant from the overflow tank cap when hot thoughts?


Two cooling fans controlled by three relay's . If only one fan is working ,that could be a problem .
Coolant Level Sensor Description
The coolant level sensor monitors the coolant level in the cooling system and indicates if the coolant is low. This sensor is located at the base of the radiator surge tank and is not serviceable.
CHECK COOLANT LEVEL (2)
The IPC receives a discrete input from the engine coolant level switch. The engine coolant level switch is normally closed. When the engine coolant is low, the engine coolant level switch opens. When the IPC receives an open signal from the engine coolant level switch, the IPC displays the message on the DIC.

Relay Driven Dual Cooling Fan Diagnostics There are using a pontiac , by your cadillac is the same .

Mar 24, 2017 | 2000 Cadillac DeVille

1 Answer

What color anti-freeze igoes in 1999 cadillac concourse?


I can't advise on the type of coolant additive (I don't know your model) but in general if the coolant level is OK already then the additive won't explain this overheating.

It could be

- head gasket leak to the coolant jacket. There is a cheap test a mechanic can do for combustion gases in the coolant

- faulty temperature sensor unit

-slipping drive belt to the fan (if fitted)

- thermostat stuck closed

Jun 15, 2014 | 1999 Cadillac DeVille

1 Answer

I have a 99 Cadillac D'Elegance, that just started overheating. It didn't lose anti freeze/coolant until after it overheated. I turned the heat up to the highest temp. and it blew out cool


water level was low thats why it blew cold ,you may have a slight leak somewhere but once the level drops below a critical amount then it will overheat so ask a local mechanic to have a good look for you as this sort of problem is often beyond the scope of a owner to locate the leak ,when running check the difference between the top and bottom rad hoses as well if bottom hose cold then it could be the thermostat .

Jun 16, 2012 | Cadillac DeVille Cars & Trucks

1 Answer

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My peugeot 206 keeps cuttin out and the enguin light comes on while im driving it started off only doin it a couple times now its doin it often it seems to get hot quicker than normal 2. its ok if i am...


SOUND LIKE ENGINE OVERHEATING,CHECK COOLANT LEVEL MAKE SURE YOUR RADIATOR FULL OF ANTIFREEZE.IF YOUR COOLANT OVERFLOW JUG IS EMPTY COOLANT LEVEL IS LOW.NEED ADD MORE COOLANT TO OVERFLOW UNTIL COOLANT STAY AT FULL COLD MARK. DONT OVER FILL COOLANT OVER FLOW JUG.IF COOLANT OKAY ENGINE OVERHEATING REPLACE THERMOSTAT.MAKE SURE ENGINE COOLING FAN IS WORKING IF YOU COME TO A STOP CAR SITS FOR A LITTLE WHILE START OVERHEATING THE COOLING FAN NOT TURNING ON , BECAUSE COOLANT FAN FUSE BLOWED OR YOU HAVE BAD RELAY,THE ENGINE COOLANT TEMPERATURE SENSOR FAULTY.IF YOU HAVE THE CLUTCH TYPE COOLING FAN, MAKE SURE WHEN TURNING CLUTCH FAN WITH HAND COOLING FAN SHOULD HAVE RESISTANCE WHEN HOT.IF CLUTCH FAN FEEL WOBBLY AND LOOSE REPLACE IT.TAKE VECHICLE TO AUTO ZONE OR ADVANCE AUTO PARTS OR ANY AUTO PARTS STORES THEY WILL CODE SCAN CAR FREE AND GIVE YOU THE CHECK ENGINE LIGHT TROUBLE CODE TO SEE WHAT CAUSING CHECK ENGINE LIGHT TO TURN ON.

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2 Answers

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Most likely a cracked block or free plug that came out or loose. Other options are hozes, which I believe the dealer would have fixed. A third option is the water pump itself. 

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1 Answer

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sounds like it might be low on coolant. Low coolant levels will stop the flow and circulation to the heater core, and also might be the cause of overheating

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