Check the listing for details. 2000-2002 Cadillac Eldorado Engine Computer PCM ECU Siemens 12573503 OEM TESTED. Condition: Used. Listed at 112.49 USD. Compatibility (Interchange) This module is a direct fit for the following vehicles (please verify the Service No. 12573503 matches the original part): 2000–2002 Cadillac Eldorado (4.6L Northstar V8) 2000–2003 Cadillac DeVille / Seville 2001–2003 Oldsmobile Aurora (4.0L V8) 2006 Chevrolet SSR (Specific IDs only) Genuine GM / Siemens Engine Control Module (PCM/ECU) Up for sale is a tested, used engine computer removed from a 2002 Cadillac Eldorado. This unit is the Siemens SIMTEC 5.G model with Service Number 12573503. Condition: Good used condition. Some surface oxidation and scuffs (see photos), but fully functional when removed. Important Note: This module must be programmed by a dealership or a technician with the appropriate GM tools to match your vehicle's VIN and security (VATS/Passkey) system.