Car Problem Reports

Cadillac DeVille Powertrain Control Module may Develop Fault

Cadillac DeVille Problem
10 Reports
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Model Years Affected: 1990, 1991, 1992, 1993, 1994, 1995, 2005

Engine Affected: 4.9L V8

Average Mileage: 99,780 mi (54,560 mi - 145,000 mi)


This powertrain control module (PCM) may develop a fault with its electrical ground location at the front of the engine block near the starter motor.

  • Visitor, , 54,560 mi

    car missed at idle then shutting down while driving down highway. took car to 2 dealerships plugs,wires,cap and rotor button replaced. 3 cats put on an egr o2 sensor new battery fuel injectors and all this work I still had same problem. solution; I was ready to scrap the car then an old mechanic that knew nothing about computers told me to check all my grounds. I thought he was crazy but I had nothing to loose. ran all grounds down cleaned them and guess what,, car runs like new I ask him how he knew that he just smiled goes to show computers cant beat wisdom made me feel pretty stupid. p.s. don't forget the ground down by the starter that was my problem the whole time

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