Riviera V6-3.8L SC VIN 1 (1995)
PROM - Programmable Read Only Memory: Application and ID
Additional PROM Information
New ECM PROMs for GM vehicles may be released for service at any time. The information in this system is accurate to the best of the
publisher's knowledge and the publication date of the disk. Before ordering a PROM, consult with a GM parts and service dealer to verify
the latest part number information. Scanner PROM ID information for earlier-model vehicles (1980-83) is less complete than for later models.
To accurately identify PROM's in earlier vehicles, it may be necessary to check the external PROM code marked on the PROM.
General Motors has often recommended that dealership technicians check the PROM history of a vehicle and install the most recent PROM
revision before performing other diagnostic operations. Each succeeding PROM revision for a specific vehicle includes all previous revisions.
Therefore, whenever you consider changing a PROM, review the entire PROM history to see if any revision covered the current driveability
problem. Installing the most recent PROM revision may be impractical however for an independent service facility, particularly if the latest PROM
revision does not address the specific driveability problem of the vehicle.
