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1984 Cadillac Deville

Owner reports · Recalls · Investigations

Limited comparison data

There is not enough comparable history to draw a useful model-year comparison.

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How this year compares

Owner complaints by model year

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Counts vary with age, sales and reporting. They are not failure rates.

What owners reported most

Tap a category to read its complaints. One report may name several components.

When problems were reported

Mileage at the reported incident

Limited mileage data: 1 of 6 reports include usable mileage. There isn’t enough coverage to show a useful chart.

NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.

What to inspect

Issues worth paying extra attention to based on owner reports.

  • Engine And Engine Cooling. Review the 2 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Vehicle Speed Control. Review the 2 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Electrical System. Review the 1 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

0 crash reports0 fire reports1 injury reports

What owners actually said

6 reports
90,995 miles · Nov 30, 2004
Fuel System, Gasoline

RECALL 93E019000 REGARDING FUEL SYSTEM OTHER PARTS: WHILE PULLING INTO A PARKING LOT VEHICLE STALLED. CONSUMER NOTICED FUEL WAS LEAKING ONTO THE ENGINE. A MECHANIC INFORMED THE CONSUMER THAT THIS VEHICLE WAS UNDER A RECALL. CONSUMER CONTACTED A LOCAL CADILLAC DEALER, WHO INFORMED THE CONSUMER THAT NOTHING WOULD BE DONE. *AK

NHTSA ODI #10101854

Mileage unknown · Mar 11, 1999
Vehicle Speed ControlInjury

VEHICLE EXPERIENCED SUDDEN ACCELERATION RESULTING IN VEHICLE ACCIDENT WITH INJURIES.

NHTSA ODI #544287

Mileage unknown · Jan 23, 1997
Vehicle Speed Control

SUDDEN ACCELERATION, CAUSING ACCIDENT.

NHTSA ODI #602478

Mileage unknown · Nov 25, 1996
Engine And Engine Cooling

ANTI-FREEZE FOUND IN CRANKCASE, CAUSING COOLANT LIGHT TO COME ON.

NHTSA ODI #511900

Mileage unknown · Nov 13, 1995
Engine And Engine Cooling

PURCHASED VEHICLE USED WATER ON THE ENGINE NEED TO REPLACE ENGINE. TT

NHTSA ODI #974914

Mileage unknown · Jun 22, 1995
Electrical System

THE ENGINE IS MAKING TERRIBLE NOISE AND WILL NOT START AND IS NOT DRIVEABLE BECAUSE OF THE NOISE. PLEASE EXPLAIN. TT

NHTSA ODI #967556

Official recalls

0

No recalls in this snapshot.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

3

EA88019 · Hydro Boost

Opened Jan 28, 1988 · Closed Oct 31, 1990

Status: closed (inferred from source dates) · Steering

There is no summary currently available

PE87054 · Trunk Fires

Opened Sep 4, 1987 · Closed Feb 8, 1988

Status: closed (inferred from source dates) · Structure

ACCORDING TO REPORTS, THE REAR EXHAUST SYSTEM RESONATORS HAVE A VERY SHORTSERVICE LIFE, USUALLY RUPTURING ON THE END, VERY NEAR THE FLOOR OF THETRUNK.HOT EXHAUST GASES FROM THE BLOWN RESONATOR REPORTEDLY GET THEFLOOR OF THE TRUNK SO HOT THAT FIRES HAVE RESULTED.PROPOSED ACTION:OPEN A PRELIMINARY ANALYSIS===

PE87038 · Hydroboost Failure

Opened Jul 9, 1987 · Closed Jan 28, 1988

Status: closed (inferred from source dates) · Steering

SUBJECT VEHICLES:CAPRICE, CAPRICE CLASSIC, CUSTOM CRUISER, DEVILLE,ELECTRA, ESTATE WAGON, FLEETWOOD, LESABRE, NINETY-EIGHT, PARISIENNE,PARK AVENUE.(ALL 1984-86 GM VEHICLES EQUIPPED WITH HYDROBOOST II SYSTEMS)ANALYSIS:CONSUMER COMPLAINTS ALLEGE SEVERAL PROBLEMS INVOLVING THE POWERSTEERING AND POWER BRAKE SYSTEMS OF THESE VEHICLES.THESE PROBLEMSINCLUDE: POWER STEERING FLUID LOSS, POWER BRAKE FLUID LOSS, LEAKAGE FROMTHE HYDRO-BOOST II POWER BRAKE BOOSTER, BROKEN BOOSTER SEALS, AND MASTERCYLINDER FAILURE.ALL PROBLEMS SEEM TO BE RELATED TO THE HYDRO-BOOST IIPOWER ASSIST SYSTEM, IN WHICH THE WORKING FLUID PROVIDES POWER ASSIST TO BOKE BOOSTER.THE EFFECT OF THESE PROBLEMS COULD BE A LOSS OF STEERINGCONTROL AND/OR BRAKE EFFECTIVENESS.STATUS:THE VOLUMINOUS AMOUNT OF DATA SUPPLIED BY GM IS PRESENTLY BEING CODED BY A CONTRACTOR AND SHOULD BE COMPLETED BY 12/30/87. GM DATA INDICATED A 50% WEIBULL DISTRIBUTION FAILURE AT 50K MILES FOR THE PISTON PUSH-ROD SEAL. THIS PE LOOKS TO HAVE AN EXTRODINARILY HIGH FREQUENCY, ALTHOUGH THE SEVERITY APEARS TO BE LOW.SHOULD BE INTERESTING DISCUSSING THIS FOR UPGRADE/CLOSURE.===