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Problems for specific Cadillac DeVille years:

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Most reported 1993 Cadillac DeVille problems

 

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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

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.

 

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Verified for the Cadillac DeVille

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 correct this concern.

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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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