1984 Cadillac DeVille Service and Repair Manual
This 1984 Cadillac DeVille factory service and repair manual is built around the exact trim you own, carrying the specifications and procedures Cadillac published for that specific configuration rather than a generic full-line printing.
Engines covered
- 4.1L V8 (250 cu in) — OHV, naturally aspirated, gasoline
- 5.7L V8 (350 cu in) — OHV, naturally aspirated, diesel
Body styles covered
- 2-door coupe
- 4-door sedan
Trims covered
- Base
- Cabriolet
- d'Elegance
Known issues on the 1984 DeVille. One recall is on federal record for this model year, covering the fuel system: the fuel filters were produced with an incorrect threaded fitting that is similar enough in size that the filter may appear to be correctly threaded onto the fuel line, and the fix was replacement with the correct filter. Owners have filed 6 complaints for the year, and no technical service bulletins are logged. The factory diagnostic and repair procedures behind that fuel delivery system are here.
Whether you're inspecting the fuel filter connection or working through a routine service interval, it keeps you on the OEM procedure and the correct specification for your specific 1984 DeVille.
THE FUEL FILTERS WERE PRODUCED WITH AN INCORRECT THREADED FITTING. THE INCORRECT FITTING IS SIMILIAR ENOUGH IN SIZE THAT THE FUEL FILTER MAY APPEAR TO BE CORRECTLY THREADED ONTO THE FUEL LINE.
REPLACE THE FILTERS WITH THE CORRECT FILTERS.
THE IMPROPER THREADING COULD CAUSE A GASOLINE LEAK WHICH MAY RESULT IN AN UNDERHOOD FIRE WHEN EXPOSE
VEHICLE EXPERIENCED SUDDEN ACCELERATION RESULTING IN VEHICLE ACCIDENT WITH INJURIES.
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 VE
SUDDEN ACCELERATION, CAUSING ACCIDENT.
ANTI-FREEZE FOUND IN CRANKCASE, CAUSING COOLANT LIGHT TO COME ON.
PURCHASED VEHICLE USED WATER ON THE ENGINE NEED TO REPLACE ENGINE. TT
Showing the 5 most serious of 6 complaints filed with NHTSA.
