1993 Cadillac DeVille Problems

RepairPal has identified the most common problems with the 1993 Cadillac DeVille as reported by actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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Known Problems

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.


Fuel injectors can short-circuit electrically causing a rougher than normal idle and reduced performance.


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.

The oil pressure switch and timing cover gasket may develop an engine oil leak.

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.

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

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.

Our technicians highly recommend that the fuel filter be replaced every 30,000 miles.