For ZR1 use P#304769.
The ECM must not have any visible evidence of damage or fluid intrusion. Keep the chip out of your original ECM.
If your Corvette's ECM requires replacement, consider the cost and performance advantage a rebuilt ECM offers over a new GM part Remanufactured ECMs exceed factory-original specs and are sold on exchange. Rebuild does not include PROM (chip)
Note: No Cores are available, you must supply core to be rebuilt.
SENDING INSTRUCTIONS: Ship part via UPS if possible & insure package in case of damage enroute. Write FOR REBUILD on outside of box. Inside, include a sheet with your name, address, email and phone # so we may call you for billing info. Put at least 3" of packing material all around part.