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1991 Cadillac Seville Problems

Find the most common issues based on 1991 Cadillac Seville owner complaints.
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Most Common 1991 Cadillac Seville Problems

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...
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 ass...
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...
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2 Known 1991 Cadillac Seville 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 1991 Cadillac Seville 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 1991 Cadillac Seville 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...

7 Known 1991 Cadillac Seville Engine Problems

The spark plugs should be replaced every 30,000 miles and the spark plug boots should be checked for hot spots and cracks.
Fuel injectors can short-circuit electrically causing a rougher than normal idle and reduced performance.
A coolant leak may develop from the water pump. The engine may overheat as a result of the coolant loss. A leaking water pump should be replaced.

4 Known 1991 Cadillac Seville Exhaust & Emissions Problems

The EGR control solenoid or EGR valve may fail causing the Check Engine Light to illuminate.
An updated PROM (Programmable Read Only Memory) chip may be available for the powertrain control module (PCM). Check with your dealer.
The powertrain control module (PCM) can fail causing stalling, and various engine and transmission drivability concerns.

2 Known 1991 Cadillac Seville 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 1991 Cadillac Seville Maintenance Problem

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

1 Known 1991 Cadillac Seville Miscellaneous Problem

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 ass...

2 Known 1991 Cadillac Seville 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.

22
Known 1991 Cadillac Seville Problems & Complaints

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...
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...
Fuel injectors can short-circuit electrically causing a rougher than normal idle and reduced performance.
The alternator may fail causing the battery to go dead, or an abnormal noise may develop. The dash warning light may or may not illuminate. A failed alternator will require replacement.
Brake fluid can become dirty and may cause problems in the brake system; it should be flushed every 60,000 miles.
The EGR control solenoid or EGR valve may fail causing the Check Engine Light to illuminate.
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...
A coolant leak may develop from the water pump. The engine may overheat as a result of the coolant loss. A leaking water pump should be replaced.
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 high-pressure power steering lines are known to leak.
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 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 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 ass...
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...
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