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1991 Cadillac DeVille Problems

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

for the Cadillac DeVille

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.

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Trunk Lid Won't Close Due to Trunk Pull Down Switch Failure

for the Cadillac DeVille

The trunk pull down switch may fail causing the trunk lid not to close completely. Our technicians tell us that the failed switch can be replaced without changing the complete pull down motor assembly.

48 Reports

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ABS Light Due to Control Module Failure

for the Cadillac DeVille

The anti-lock brake system (ABS) control module may fail causing the ABS light to illuminate. Failed modules should be replaced to restore ABS operation.

44 Reports

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Electronic Level Ride System May Fail

for the Cadillac DeVille

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.

41 Reports

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Car Won't Start and Security Light is On

for the Cadillac DeVille

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.

32 Reports

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The Parking Brake May Not Automatically Release

for the Cadillac DeVille

The parking brake may not release automatically due to a failed vacuum switch or actuator. Our technicians tell us that if vacuum is supplied to the actuator when the transmission is in gear, the vacuum switch is functioning and replacing the actuator should correct this concern.

25 Reports

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Transmission Fluid Leak From Cooler Line

for the Cadillac DeVille

The rubber section of an automatic transmission cooler line may develop a fluid leak . In some cases the leaking section of hose can be replaced. In others, the complete cooler line must be replaced to correct this concern.

25 Reports

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Air conditioning compressor may leak or become noisy

for the Cadillac DeVille

The air conditioning compressor may become noisy or develop a refrigeration leak, requiring replacement.

15 Reports

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High Pressure Power Steering Hose Can Leak Fluid

for the Cadillac DeVille

The high-pressure power steering lines are known to leak.

14 Reports

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Check Engine Light Due to Intake Manifold Vacuum Leaks

for the Cadillac DeVille

An intake manifold vacuum leak can develop from a variety of sources, often causing illumination of the Check Engine Light with codes P0171 & P0174 stored. Thorough diagnoses will be necessary to pinpoint the cause in order to make the correct repairs. A "smoke" machine is often used to isolate the cause of difficult to find vacuum leaks.

11 Reports

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