1991 Cadillac DeVille - Answered Questions & Fixed issues


It sounds like the Bose has a problem internally. It may just be a resistor or fuse.

1991 Cadillac... | Answered on Jan 21, 2018 | 121 views


1989 1997 CADILLAC DEVILLE REPAIR MANUAL
You can simply get solution to your problem online here in this link

1991 Cadillac... | Answered on Nov 23, 2017 | 108 views


why would you have the brakes checked if your engine is running poorly. the engine while running makes vacuum and if that is not running correctly it will effect other systems. brakes for one work of a vacuum booster. so no vacuum sure the brake pedal will be hard to work. you will want to pull the plugs and test the compression of all the cylinders and write them down and compare that numbers first. my guess you have some bad valve issue or what they call blow bye and losing compression on 1 or more pistons. which may need to remove the heads and rebuild or replace. or even replace the engine all together depending on whats wrong. start with a compression test and go from there.

1991 Cadillac... | Answered on Nov 08, 2017 | 49 views


overheat problem
possible low coolant level or head gasket

1991 Cadillac... | Answered on Nov 05, 2017 | 181 views


??? (More Info) Please Reword This Question !! (More Info)

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1991 Cadillac... | Answered on Aug 25, 2017 | 94 views


you hsve a vacum leak

1991 Cadillac... | Answered on Jul 21, 2017 | 27 views


first of all try driver master switch then try back door switch
cut on dome light and press button if it is working lights will dim if they do not dim most likly the motor is going bad give it a sharp rap might bring it back up if motor is good you may need a regulator for the window

1991 Cadillac... | Answered on May 04, 2017 | 148 views


The charging system is doing its job It seems to have an electrical short which is draining the batt. If u have the know how to ck & repair electrical shorts then go after it, if not, take it in.

1991 Cadillac... | Answered on Apr 07, 2017 | 80 views


Deville-under the RH close out panel under the dash.

1991 Cadillac... | Answered on Jul 01, 2016 | 86 views


I would try eBay for a used factory repair manual which will contain the wiring diagrams.

1991 Cadillac... | Answered on Jun 21, 2016 | 59 views


Try turning the key to the on position and wait for the security light to stop flashing (usually ten or fifteen minutes) then turn the key off and try to start it. On some you need to do that procedure three times without starting but most will re-start after doing it once. Usually this will work to re-set security on GM vehicles.

1991 Cadillac... | Answered on Jan 28, 2016 | 1,693 views


There are many things that can contribute to this problem. It sounds like it may be ignition related. Possibly an ignition control module or ignition coil. The check engine light coming on while driving is the key to finding the problem. The light comes on when the computer finds a problem and will then store it in its memory. Have the codes checked for what the computer has found to be at fault and with a little diagnostics, should lead you to the problem

1991 Cadillac... | Answered on Jan 09, 2016 | 306 views


alternator is overcharging the battery replace alternator

1991 Cadillac... | Answered on Dec 04, 2015 | 323 views


It needs spark, too... Not sure if you have a coil/distributor, or something more modern. I would follow the plug wires back and see what they're connected to.

1991 Cadillac... | Answered on Nov 17, 2015 | 70 views


It could be a bad wheel bearing, and if so it probably is the passenger side, but check them both sides. Raise both wheels off the ground, or one at a time, and rock the wheel back and forth and up and down. The side with the bad bearing will have a lot more play in it.
To replace, the wheel "hub" with sealed bearing inside is replaced. The hub is bolted to the wheel knuckle, which supports the hub, the CV joint and axle shaft, the brake caliper and rotor, and the wheel itself. If you are experienced at car repair and have the proper tools, you can do it yourself. At a shop, expect a 2-4 hour labor bill, maybe under 2 hours if everything comes off easily. The cost of the hub and sealed bearing is probably less than $100, although prices can vary greatly.

1991 Cadillac... | Answered on May 14, 2015 | 120 views


wheel bearing , worn shocker , steering linkage , would need inspecting , even tyre pressure/condition

1991 Cadillac... | Answered on May 13, 2015 | 39 views


When you say it skips, should I presume you mean the engine lopes.? more information would help... Perhaps it sounds like it is doing this at idle, or when stopped in gear foot on brake or while driving.... It could be as simple as you having a loose spark plug wire, so lets start there, go push each wire onto their connection at both ends and check back and let us know more of whats happening, or if that fixed it

1991 Cadillac... | Answered on Apr 02, 2015 | 72 views


The valve cover gasket is probably one of the easiest repairs to make. Curious as to what your question actually is? Meaning, do you need to know what is required such as gasket's, sealants and tools, or maybe just the Torque spec's for tightening the bolts back on the covers...

1991 Cadillac... | Answered on Apr 02, 2015 | 115 views


this can be a rather time consuming task, depending on your mechanical talents. if you need to do this for an oil leak, you might have a friemd or a mechanic do this for you. The actuall job its self is relatively easy. just remove the valve cover, clean any remanents of the old valve cover gasket. Clean the surface of bothe the valve cover and the head and put the new gasket in place and mount. The real problem in most cases is getting to it to do the work. there is no telling how much stuff you have to remove to get to the valve cover.
good luck with this.

1991 Cadillac... | Answered on Mar 20, 2015 | 294 views


Usually you can find a locksmith that has a mobile service and they can make a proper key.

1991 Cadillac... | Answered on Mar 04, 2015 | 180 views

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