Question about 1998 Cadillac DeVille

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My 1998 Cadillac deville key fob would not work.

Key fob would not work. Repalced battery, reset fod. Then reset other fob, maybe not in right order? now, neither fob works., and the car is "dead" won't start, or anything. No display. How can I fix this?

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Take it to a car place like Kragen or Auto Zone or take it to a GM dealer.

Posted on Apr 20, 2014

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How to program a keyless fob for 2001 cadillac deville


Unfortunately, the website I found says there is no on-board method of programming your car for a new key-fob. You have to take the car to a dealer or to a key-maker (who may only charge half as much as the dealer)

Key Fob Remote Programming Instructions 2001 Cadillac Deville Key Fob...

Feb 22, 2015 | 2001 Cadillac DeVille

1 Answer

Looks like after a couple of hours after being off my 1998 Cadillac deville gets deprogramed like if I would put a new battery and my power locks work whenever they feel like working


that could be down to the fob. if it gets damaged it can do this. you would need to take the fob in to some were werethey can check it for faults.

Oct 26, 2013 | Cars & Trucks

1 Answer

1998 Deville was drove to work came out it wouldn't start replaced the battery. Now it turns over but wont start. Any suggestions?


auto right? there is a neutral/park relay on automatic transmission equipped cars. if it is broken or loose it wont let you to run engine (like you did not place the shifter to N or P position)

also for some US made cars you need to press brake pedal to start car, there is a switch for that you need to find its location on your car.

least possible option. your immobilizer is problematic. it can unlock doors but wont allow it to run engine.

Nov 19, 2011 | 1998 Cadillac DeVille

1 Answer

I'm having a problem trying to get my car started when I try to turn it on starting disabled appears up why?i


The key resistor may be dirty if it has that type of key. I have this type of key on my 1997 Cadillac Deville.

If all else fails, maybe take it to the dealer to see if you can have the key checked out for compatibility with your vehicle.

I understand that multiple fobs have to be programmed into the computer if they don't work right with the vehicle.


Oct 08, 2010 | 1998 Cadillac DeVille

1 Answer

I HAVE A 1998 CADILLAC DEVILLE THE A/C/ WENT OFF AND THE COMPRESSOR WENT OFF HOW DO I RESET BOTH..


OK, if the A/C system has been discharged of R134a for any length of time, the car may have to be reset by disconnecting the battery and reconnecting after a few minutes.

That's the way my 1990 Cadillac Deville is, as it's a safety measure for preventing low freon level operation of the compressor which can damage the compressor.

My 1997 Cadillac Deville Limo hasn't had any leakage issues, so I don't know if this would work on that late of a Cadillac.

After adding r134a to the low side, and if the compressor doesn't work, then this could very well be your problem.

Good luck on this repair.

Sep 16, 2010 | 1998 Cadillac DeVille

1 Answer

Programming a keyless entry remote


Key Fob Auto Learn
This procedure will first erase all known key fobs. The procedure will then program a single or multiple key fobs. Method 3 is a series of three 10-minute key cycles, for a total of 30 minutes. This procedure requires that you have a replacement key fob and the vehicle mechanical key.

Important: All previously programmed key fobs will be erased upon completion of the 30-minute programming procedure. The order in which the key fobs are programmed will determine its numbering position within the RCDLR memory. The first key fob programmed will be key fob #1, and the second key fob programmed will be key fob #2. The number stamped on the key fob case is for reference only: #2 can be programmed as #1.
Do not place any known good key fobs in the vicinity of the vehicle when programming. 

The vehicle must be OFF. 
Place the replacement key fob in the console pocket with the buttons facing forward. 
Insert the vehicle key in the driver door lock cylinder located in the driver door handle and cycle the key 5 times within 5 seconds. 

The DIC will display a message: OFF/ACC TO LEARN. 
Press the OFF/ACC portion of the ignition button. 
The DIC will display a message: WAIT 10 MINUTES, then it will count down from 10 to 0, one minute at a time. 
When the counter reaches 0, DIC will display OFF/ACC TO LEARN. 
Repeat steps 5-7 two more times, for a total of 30 minutes. 
The DIC will display a message: OFF/ACC TO LEARN. 
Press the OFF/ACC portion of the ignition button. 
A beep will occur and the DIC will display: READY FOR FOB 1. At this time all previously known key fobs have been erased. When fob 1 is programmed a beep will be heard and the DIC will display a message: READY FOR FOB 2. 
Additional key fobs can be programmed by taking fob 1 out of the pocket and inserting fob 2. If desired, up to 4 fobs can be programmed. Once 4 fobs have been learned, the DIC will display a message: MAX FOBS LEARNED, and automatically exit the program mode. 
If learning less than 4 key fobs, press the OFF/ACC portion of the ignition button to exit the program mode. 
Operate the active portion of each key fob in order to finalize the programming sequence and verify correct system operation. 

Good luck and hope this help's keep me posted, there are 3 other methods and the 5th method is a tech 2 scan tool that the dealer uses but this should work on your year of cadillac. 

Jul 01, 2009 | 2003 Cadillac Deville

2 Answers

Battery dead after sitting too long, after battery is charged, security light comes on and car will not crank... Is there a sequence that needs to be followed in order to reset the theif security on this...


lock and unlock the doors with the key fob this usually resets the alarm. If the key fob doesnt work there is a procedure for resetting the system. But I can't remember off the top of my head but the owners manual does tell you how

Jun 21, 2009 | 2000 Cadillac DeVille

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