1999 Cadillac DeVille - Page 8 - Answered Questions & Fixed issues

On a cadillac deville in the front door.an in the Seville it's in the b-pillar above seatbelt retractor.

1999 Cadillac... | Answered on Jun 17, 2014 | 164 views

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

1999 Cadillac... | Answered on Jun 15, 2014 | 52 views

if you have a key try to lock then unlock door before you get in this tells computer you have key and might work the remote turns it on and off maybe try a shop that installs remote starts ask for a universial remote or google 99 deville fuse diagram hope this helps good luck

1999 Cadillac... | Answered on Jun 12, 2014 | 378 views

Yes, it should reset the memory, I know it does on my deville, so it should be the same on an eldorado.

1999 Cadillac... | Answered on Jun 12, 2014 | 89 views

Try on the front of vehicle behind the front impact bar.
Also try on the right front of the engine compartment, behind battery.

1999 Cadillac... | Answered on Jun 11, 2014 | 135 views

sound like a bad heater core! the heater core is like a small radiator that is usually locaded in the dashboard on the passenger side. now if the leaking is really bad you are going to see water dripping by the front passenger tire or if it gets really bad it may leak inside the car. in order to fix this problem the HEATER CORE must be replaced. good luck

1999 Cadillac... | Answered on Jun 04, 2014 | 693 views

Do you mean your looking to drain the refrigerant (R134a) from the A/C system?
If so there is no drain plug. you will need to find a garage that has an A/C recovery/recharge machine & have it recovered before you can open the system.
If you are looking for the evaporator water drain tube it comes out of the firewall near the center on the passenger side of the car. you can see it from underneath the car. it has no plug though unless of course you've been driving many dirt roads, then it can build up a "Plug" of dirt on the end of the tube that can block it.

1999 Cadillac... | Answered on May 29, 2014 | 391 views

Your heater core is broke.

1999 Cadillac... | Answered on May 29, 2014 | 25 views

I think work per hour 85.00 to 100.00 plus cost of alternator 100.00 or more.

1999 Cadillac... | Answered on May 28, 2014 | 24 views

usually located on or near the thermostat housing.

1999 Cadillac... | Answered on May 23, 2014 | 61 views

The security, antitheft or lock picture/icon is a visual indication that something in the car's antitheft system is failing. 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. This is why the security light turns on and shuts down your vehicle. This link explains it pretty well.

1999 Cadillac... | Answered on May 21, 2014 | 75 views

How strong is the battery might need to have it check for dead cells. It sounds like it might be a power problem, either the battery not holding a charge, or cables Hot or Negitive lose trace them to the starter. In the olds I would take the breather off and put a spout in the carburetor this step you ned to be safe step away from the veh before cranking. But if it only turns over 1 or 2 seconds then stops it got to be a break in the power to the starter. Hope this helps

1999 Cadillac... | Answered on May 17, 2014 | 34 views

Compression is what happens when the piston comes up and compresses the fuel/air mixture. Then the spark plug ignites it and the explosion drives the piston down in turn, turning the Crankshaft in turn making the car go. A compression leak is when this compressed fuel/air mixture is escaping from the combustion chamber.. This can happen 3 ways. 1. Bad piston rings, 2. Blown head gasket or cracked head or block, (usually caused by overheating), Or the least costly.. loose spark plugs.

1999 Cadillac... | Answered on May 16, 2014 | 116 views

Compression leak can be caused by a couple of things valves not seating sticky rings. if the car doesn't smoke it's most likely the valves not seating properly. you can get a compression gauge remove a spark plug crank the motor and watch the gauge. this will tell you what cylinder is giving you the trouble. hopefully this helps.

1999 Cadillac... | Answered on May 16, 2014 | 30 views

Look for loose steering components.
, also check Front brake rotor run out.

1999 Cadillac... | Answered on May 11, 2014 | 132 views

my husband did everything that everyone else did that had this overheating problem. It was so weird that my engine cooled at a light and heated up going down the road. I have a north star 4.6 engine and this is natorious for happening. my check engine light also came on and so I had a diagnostics done which told me my #1 injector wasn't firing , car ran like **** as well. After putting in a new water pump and plugs,ect. and realized injector was good a friend told him we could have a blown head gasket. So just to see if this was the problem I went to buy a bottle of glassbeads and the auto parts guy told us to purchase a bottle of BARS STOP LEAK BLOCK SEALER NOT RADIATOR BUT BLOCK SEALER $31.99 . He followed the directions and we waited 24 hrs. before driving it. What ever the problem was has stopped my car runs like brand new and I am loving it again. no over heating no injector problem, runs great.......I hope this helps. I know its probly a temperary fix but its a fix and now we know what the problem was. SASSY

1999 Cadillac... | Answered on May 02, 2014 | 8,926 views

just look at fuse and see with your own eyes or use a multimeter. If fuse is good the it could be bad sensor or the fan could actually be bad.

1999 Cadillac... | Answered on Apr 27, 2014 | 20 views

sounds like the tires are lower on one side or the drivers weight is being adjusted for.

1999 Cadillac... | Answered on Apr 27, 2014 | 28 views

Contact Authorized Service Station or any other Proficient Mechanic.

1999 Cadillac... | Answered on Apr 26, 2014 | 14 views

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