Question about 1999 Cadillac DeVille

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1999 cadillac de ville

I just spent my last bit of money on gettin a key made and it doesnt work and i cant get a refund. How can i disable the theft system and just hot wire it 4 now? is that possible?

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It is possible you would have to disconect the ignition cylinder at the bottom of the collar (orange wire) and find out what ohms your key is go radio shack get the correct diode and solder onto wires

Posted on Sep 30, 2008

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Where is the idle control valve on the 1999 Cadillac De Ville and is it the same thing as the idler motor?


The IAC or idle air control valve is mounted in the throttle body and uses an air passage that opens or closes to increase idle speed where as an idle motor usually pushes against the throttle plate to increase idle speed most idle motors (stepper motors) where phased out and was never used on port fuel injected engines chances are you have an IAC valve

Dec 11, 2012 | 1999 Cadillac DeVille

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Automatic ?? You should be able to unlock the doors from the inside and open them. If someone set the child safety locks you may have to remove the door panels and unlock from the inside of the doors.

Jul 25, 2012 | 1986 Cadillac DeVille

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Cant find freez plug for 1999 cadillac davill


Hello rogelioma758: My name is Roger and I will help you. The 4.6 engine used in the 1999 Cadillac De Ville does not have freeze plugs. This was a cast aluminum engine and had no freeze plugs. How ever if you are trying to install a block heater? This engine was made to have a external heater that bolted to the block itself. Should you need further help please just ask. Please rate the answer. Thank You for using Fix Ya. Roger

Feb 08, 2011 | 1998 Cadillac DeVille

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I have cadillac de ville runs great but evrey ones in wall want i try to start wont start in tell i discconect the battery for 20 sec puted back and run agen


its your anti theft device on that vehicle doing that if you keep disconnecting battery you can damage your ecm or other electrical parts or you may not have anti theft on that vehicle and your ecm may already be going bad by dissconecting battery you reset ecm

Dec 11, 2010 | 1998 Cadillac DeVille

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99 cadillac de ville. the engine was removed and replaced to stop the oil leak. now the car does not want start. when the key is turn it just cranks over but will not fire.


you'll have to take the usual troubleshooting steps--check for spark, check for fuel, etc.

Please see my tip at http://www.fixya.com/cars/r5821173-doesnt_car_start_gasoline_engines . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

Oct 27, 2010 | 1999 Cadillac DeVille

1 Answer

I cant start my cadillac eldorado 95 it says starter dusabled due to theft system how do I fix this problem?


Go around the car to the passenger side and insert the rounded door key in the door and an lock and then unlock it with the key. This should disable the anti-theft system. This also will shut off the horn blowing when the alarm is tripped. This works on all older Cadlillacs. Hope this helps.

Oct 22, 2010 | 1995 Cadillac Eldorado

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Need to locate thermostat in 99 Cadillac De ville 4.6L


it's in the thermostat housing that is close to a belt driven water pump on the driver's side. Thermostat is hidden inside this housing.

Jun 25, 2010 | 1999 Cadillac DeVille

1 Answer

I lost my key to my 1963 Cadillac coupe DE ville I was curious how I should go about replacing it.


Ive been told that gm can cut a key using the information in your vin number. I wouldnt know if gm would still have records from 1963 to help them cut a key but it would be worth a try.

Nov 06, 2009 | Cadillac DeVille Cars & Trucks

2 Answers

95 Cadillac De Ville


had the same problem with mine but found out it was the key if its not the origanol or the chip is made wrong it will do that

Nov 25, 2008 | 1995 Cadillac DeVille

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