20 Most Recent 1998 Cadillac DeVille - Page 7 Questions & Answers

well section off the car on flat ground let idle until leak leaves signs on the ground in front on the wheels hoses, radiator, on right side of car near rear heater hoses waterpump on drivers side hoses engine gaskets.

How about going to a repair shop, if you don't work on cars How would anyone be able to guess at that question?

Check the a/c belt tention

The passenger side air temp control has a problem. Check connections at switch. If you have a volt meter you can check the switch for continuity or ohms of resistance. No continuity, replace switch.

Check to see if the switch is properly pressed in when the door is shut. Also check to see if the wire is grounding

i would check the door open/close switch in the door jams. there should be a small button in each door jam that makes this light go out. i would go to each one and make sure they are not damaged first. then i would go one door at a time and manually push each button to see if the light goes out this way. once you narrowed this down hopefully you just need one of the switches. hope this helps

Probably needs a tune-up, timing may be off and check all the hoses, maybe flush the radiator too. I'd have it checked out, too many things can go wrong, and you want it done right.

The "cluster" means all of the things you see under the plastic cover in front of the driver, the 'gauges'. The term is a reference to the 'instrument cluster' including speedometer, tachometer, fuel gauge, idiot lights, temperature gauge, everything.Get a second independent opinion since this is very unusual. Most likely you have a blown fuse.

HAVE YOU CHECKED INSIDE THE TRUNK THERE IS A PANNEL ON REAR OF BACK SEAT THAT HAS RELAYS AND FUSES

bad earth contact on dashboard clocks... pull them out and redo plugs with some switch contact cleaner...if you see mould there ya go...hope this helps

mounted on passenger side firewall behind transmission dipstick

In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM (Theft Deterrent Module). These 3 parts are in CONSTANT communication. If the key is in the ignition, then these parts are sending signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, the car misinterprets this as an attempt at theft and goes into antitheft mode. The car thinks its being stolen or hotwired because it is not getting that signal from YOUR specific key all the way through the system. This is why the security light turns on and shuts down your starter, and/or the vehicle after 2-5 seconds. This link explains it pretty well. http://vatspasslockpasskeysecurityhelp.yolasite.com/

Sounds like alternator may need replacement

try using a scanner to reset the CPU program as removing the battery often corrupts the CPU program and alarm systems.

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

Please clairfy size of engine,

Your going to have to replace an actuator on the side that's failing , need to be semi experienced to do this

must be head gasket then

check if any interior lights left on ,the trunk is the usual one that gets forgotten, have battery tested for charge holding and that the alternator is charging correct voltage the alarm and door locking are a symptom not the problem which is in the charging/battery