1990 Cadillac DeVille Problem Reports

Most Reported 1990 Cadillac DeVille Problem Reports

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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.

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

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.