This listing is for part number 12581501 ECM that is programmed/flashed for your vehicle with the newest updates from GM using your VIN to match your vehicle. After you purchase the ECM you will need to provide us with your VIN so we can program the ECM before we ship it to you. It is Compatible with the following service numbers 12581501 12591026 19210733
This part will fit these makes and models with these options
GRAND PRIX 04 Electronic Control Module; (LH front engine compartment)