We have a 2014 Chevy Equinox we replaced the engine. It drove after installation for a few miles. It then just died or lost power and coasted to a stop. It then did not turn over - no start no crank. It is not the battery or starter. The starter is not getting the signal to start. I do not think it is the neutral switch, ignition switch. Using the code reader I rented it cannot connect with the computer or communicate. Is it the computer isn't compatible with the motor? We do not have a check engine light in 3rd position which may interfere with connection. I checked all the fuses as well. Where could the problem lie?