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Updated PROM Chip Available for Powertrain Control Module on Cadillac DeVille

Problem Description and Possible Solution

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

Problem Data
RepairPal Verified
Average mileage: 89,000 (89,000–89,000)
Exhaust & Emissions affected: 4.9L V8
6 model years affected: 1990, 1991, 1992, 1993, more1994, 1995
8 people reported this problem
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According to dealers this prom chip is no longer avialiable. Has anyone been able to locate any.