Top 10 1997 Cadillac DeVille Questions & Answers

The problem is the serpentine (Drive Belt) belt.Theeem belt is broken or slipping. An early detections is the power steeirng may seem tough turn at times. If you notice slight steering probles. Check the driving belt! Also, check the idler pulley for wear, if the idler pulley bad replace the pulley before putting the belt on!

HI< The maxi fuses, for a Cadillac deville.
are located Left side of engine compartment, forward of strut mount. Just remove the black cover completly, if you remove the small tap only will find mini fuses, but if you remove completly all the cover you will see the maxi fuses.

I had the same problem. trying to save money i took it to several auto places who thought they could fix it..... after a lot of money and my 800.00 after market alarm was taken off i had it took to the dealer . They fix it in two hours they put in new switch and key haven't had any problems sence.

Hello
Do you mean the engine coolant temerature sensor (ECT)? if so what OBD fault code has prompted you to change this sensor?

It is used for programing the alarm, it is used to disarm the alarm without the remote, [in case remote is damaged] and it is used to put alarm system into valet mode, [service mode] valet mode is only really needed if the alarm has been programed for passive arming, [alarm arms itself].

Your main use for the valet switch, [if programed for active arming instead of passive arming] is to have a way to disarm the alarm if the remote does not work.

Hi there:The service ride control light being on is letting you know the system has detected a fault.This can be caused by a defective esc module or a bad compressor. need to have codes pulled out of the electronic suspension control module.


Need some specific dealer tools in order to reset it or solve it.

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I am assuming you mean you loose power steering when the steering wheel locks up, which would be a normal event if the engine dies. Same goes for the battery light since the alternator would stop charging the battery.
Someone will need to figure out if you are loosing fuel or spark when the engine dies, then troubleshoot the problem. It may be difficult to find if the mechanic can not duplicate the problem in the shop.

Cadillac Northstar owners to those whose vehicle is overheating .My 99 Deville was overheating turns out it was Catalytic Converter.Dont rely on PCM for code.If the Cat converter gets plugged up the heat will not get past converter it will back up into engine block causing overheating.My deville ran at between 190 & 201 degrees this morning.If you have a misfire the unburnt fuel goes into Converter and causes damage to converter (blockage).Alot of people overlook converter when overheating happens.

Coolant should be mixed in most cases to a 50% concentration, meaning one gallon of undiluted coolant will provide two gallons of diluted coolant. Most engines will hold 2-3 gallons of coolant mix. I normally purchase two gallons of undiluted coolant. I pour the first gallon of undiluted coolant into the radiator, then fill the empty bottle with water and add that to the radiator as well to make it a 50% mix.. Then, I pour half the second bottle of undiluted coolant into the empty coolant bottle, and then top both off with water to make two gallons of 50% mix. I then add coolant to the radiator as needed until full, keeping the remainder for topping off later as air purges itself form the system.