20 Most Recent 1991 Cadillac DeVille Questions & Answers


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

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


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


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


overheat problem
possible low coolant level or head gasket

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


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

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


you hsve a vacum leak

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


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


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


the 8 cyclinder engine is one of the best you will get, forget about all the rest,so this puzzles me,what makes you think this engine is on 4 cyclinders because it should not start on 4,you are not telling me the full story,what happened what was the org problem,please come back to me as this is a new one on me.adrian

1991 Cadillac... | Answered on Nov 29, 2016


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

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


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

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


the remote control for the electric door locks should disable the alarm just lock it then unlock it, try that it might work

1991 Cadillac... | Answered on May 09, 2016

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