2004 Chevrolet S10 Q&A

2004 Chevrolet S10 Question: Security light flashing

I replace the engine, and tried to crank it, the security light continue to flash. I scan it and got a U1096 & U1016 trouble code. U1016: no communication with the PCU "powertrain control module". U1096: No communication with the IPC "instrument panel cluster" -
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