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1993 Cadillac DeVille Problems

Find the most common issues based on 1993 Cadillac DeVille owner complaints.
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Most Common 1993 Cadillac DeVille Problems

One or more of the power window regulators (one in each door) may fail causing the window to fall into the door and not roll up.
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...
The engine may develop oil leaks from the lower crankcase portion of the engine block. Our technicians tell us that the engine must be removed from the vehicle to properly repair this oil leak.
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2 Known 1993 Cadillac DeVille Brakes Problems

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.
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...

2 Known 1993 Cadillac DeVille Drive Train Problems

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 r...
You may be able to prevent transmission problems by servicing the transmission and inspecting the fluid every 30,000 miles. If the fluid is dark or burned then the transmission system should be com...

1 Known 1993 Cadillac DeVille Electrical & Lights Problem

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 igni...

9 Known 1993 Cadillac DeVille Engine Problems

The engine may develop oil leaks from the lower crankcase portion of the engine block. Our technicians tell us that the engine must be removed from the vehicle to properly repair this oil leak.
The fuel pump may fail causing the engine to stall and not restart. Our technicians recommend replacing the fuel filter every 30,000 miles to help prevent undue strain on the fuel pump.
Fuel injectors can short-circuit electrically causing a rougher than normal idle and reduced performance.

4 Known 1993 Cadillac DeVille Exhaust & Emissions Problems

The powertrain control module (PCM) can fail causing stalling, and various engine and transmission drivability concerns.
The EGR control solenoid or EGR valve may fail causing the Check Engine Light to illuminate.
Excessive carbon build up in the engine combustion chambers may be the cause of a smog check failure due to excess NOx emissions. A "top engine" decoarbonization cleaning procedure will commonly co...

2 Known 1993 Cadillac DeVille Heating & Air Conditioning Problems

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

1 Known 1993 Cadillac DeVille Maintenance Problem

Brake fluid can become dirty and may cause problems in the brake system; it should be flushed every 60,000 miles.

2 Known 1993 Cadillac DeVille Miscellaneous Problems

One or more of the power window regulators (one in each door) may fail causing the window to fall into the door and not roll up.
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 assem...

2 Known 1993 Cadillac DeVille Suspension & Steering Problems

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

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Known 1993 Cadillac DeVille Problems & Complaints

The EGR control solenoid or EGR valve may fail causing the Check Engine Light to illuminate.
You may be able to prevent transmission problems by servicing the transmission and inspecting the fluid every 30,000 miles. If the fluid is dark or burned then the transmission system should be com...
The powertrain control module (PCM) can fail causing stalling, and various engine and transmission drivability concerns.
The oil pressure switch and timing cover gasket may develop an engine oil leak.
This powertrain control module (PCM) may develop a fault with its electrical ground location at the front of the engine block near the starter motor.
The spark plugs should be replaced every 30,000 miles and the spark plug boots should be checked for hot spots and cracks.
Excessive carbon build up in the engine combustion chambers may be the cause of a smog check failure due to excess NOx emissions. A "top engine" decoarbonization cleaning procedure will commonly co...
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...
An updated PROM (Programmable Read Only Memory) chip may be available for the powertrain control module (PCM). Check with your dealer.
Our technicians highly recommend that the fuel filter be replaced every 30,000 miles.
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