S10 2003 03 Engine Computer ECM ECU PCM 12581565 4.3L - Programmed to your VIN #

  This ECM will fit the following application:****** **2003       CHEVROLET        S10                         V6 4.3L Engine (with ECM # 12581565)** **2003       GMC                       S15 SONOMA       V6 4.3L Engine (with ECM # 12581565)** **\*\*\*GM used 3 different engine computer part numbers in the above application.   If the tag on your computer has the SERV NO of 12581565 then this is the correct listing. ****\*\*\*\*\*\*GM installed this 12581565 ECM in all of the above application as well as several other GM applications.   This was possible because each of these models received their specific programming from the factory.   In other words, you can't simply swap a used ECM from one vehicle to the next.   We are a licensed user of the same GM software that a dealer would use to reprogram and update your computer.   With your purchase we will reprogram the ECM, with the latest software updates available from GM, to your specific vehicle using your VIN (vehicle identification number).**** **\\*\\*\\*\*\*\*****We have been in the ECM business for 17+ years.   The item you recieve will be of like finish.** **Other info:** **Why buy your spare ECM from us?   You will be purchasing a high quality used ECM.   You get free Flash programming with every OBDII GM computer purchased. OBDII type computers have the “chip” imbedded into the ECM and it is not removable.   The calibration file per the application is “Flashed”, or reprogrammed using a software package and a pass through device.   The “chip” is no longer removed for programming.   Proper programming is essential when replacing an ECM whether it is a used ECM or a remanufactured ECM.   A used GM computer will have the software installed that pertains to the original vehicle that it was removed from.   In some cases GM OBDII type computers will interchange with many different vehicles including those with different engine and transmission configurations.   However, unless the computer is programmed with the correct software it won’t function properly upon installation.   We will flash reprogram any OBDII computer purchased from us with your specific VIN number for the latest updated calibrations straight from GM for a stock calibration.   This is important to ensure specific vehicle programming and to guarantee flawless performance in your vehicle.   Engine computers may be referred to as ECU (engine control unit), ECM (engine control module), PCM (power train control module), Brain Box, ECC (engine control computer), VPCM (vehicle control module), or Fuel Management System.   For clarification we refer to an engine control computer as an ECM.**** **After purchasing, pay instantly with your credit card through PayPal!**

• Manufacturer Warranty: 1 Year
• Brand: Factory/OEM
• Fitment Type: Direct Replacement
• Manufacturer Part Number: 12581565