1991 Cadillac DeVille Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1991 Cadillac DeVille

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1991 Cadillac DeVille Problems

Improper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator

One or more heater & AC (HVAC) air delivery and/or temperature mode door actuator may fail. This can result in incorrect air delivery or temperature. If this occurs, fault code(s) stored in the HVAC control module should be available to assist with diagnoses.

Car Won't Start and Security Light is On

Problems with the anti-theft systems using the raised-chip key can prevent the car from starting. The wires in the steering column to the ignition lock cylinder tend to break. The the key and ignition lock cylinder must be replaced to correct this condition.

Electronic Level Ride System May Fail

The electronic level ride system may not work properly; this may result in the rear of the vehicle riding too high or too low. Our technicians tell us that a height sensor or exhaust valve failure are common issues with this system. Proper diagnoses will be necessary to confirm the exact fault.

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1991 Cadillac DeVille Recalls

Cadillac Recalls 1991-1993 Models Due to Transmission Cooler Line Leak

Cadillac has recalled 1991-1993 Cadillac DeVille and Fleetwood vehicles because the upper transaxle cooler line may leak. In the presence of an ignition source, a fuel leak in the engine compartment may result in a fire. Dealers will replace the upper transaxle cooler line.

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1991 Cadillac DeVille Reviews

I absolutely love my 91 Deville, 2 door. Most comfortable smooth ride I've ever owned. Body is immaculate, and when she's polished she's a beautiful sight goin down the highway. Headliner needs replacing, and need to replace window motors on both sides. I'm never getting rid of it, if it breaks, I'll fix it! Stereo original hasn't worked since I bought it, having new system installed next week,...
my car keeps turinnig off after like 3 20 min drives an will stay off for 40 min then turn on without a jump ..... help .... my ac blower wont turn off when car is off .... an the far for radiator keeps blowing an its getting hot alot now i replaced both lower an upwer hoes an keep flids inb there an oil good full synthetic help other then that its a strong car 123k miles 2nd tranny first engin...
Have a '91 Sedan DeVille that I bought in 2009 from orig owner. Had 74K on it. Wanted a comfortable car for long trips. Beautiful pearl white w/ navy leather. Was kept covered in a garage... No dents, chips, scratches----looks like new. Replaced the a/c compressor---bearings wore out, replaced the brake master cyl & booster, did a tune-up---still had orig wires & plugs on it. Love the ride, lo...

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