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Problems for specific Cadillac DeVille years:

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Most reported 1990 Cadillac DeVille problems

 

Verified for the Cadillac DeVille
The oil pressure switch and timing cover gasket may develop an engine oil leak.
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Verified for the Cadillac DeVille

An updated PROM (Programmable Read Only Memory) chip may be available for the powertrain control module (PCM). Check with your dealer.

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Verified for the Cadillac DeVille

The powertrain control module (PCM) can fail causing stalling, and various engine and transmission drivability concerns.

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