ECU Identification

ECU's with Soldered in (Non-Replaceable) Prom:

^ Part No. - Factory Installed: PRC7081
PRC8747

^ From VIN ...LA426808 to VIN ...MA483126

^ Date Code on ECU Label: 0590 to 4590

Example: Date Code 2590 = soldered in PROM

ECU's with Socketed (Replaceable) Prom:

^ Part No. - Factory Installed: PRC7081
PRC8747

^ From VIN ...LA391190 to VIN ...LA426807

^ Date Code (PRC7081): 0490 or below

Example: Date Code - 1289 = socketed PROM

^ Date Code Suffix Letter S (PRC8747): S indicates a socketed PROM on late VIN vehicles.