From the service manual:
Installation
NOTE: If installing a new BCM, the ignition cannot be turned on until 2 keys are programmed to the vehicle. The BCM still communicates with the diagnostic scan tool with the ignition off. If necessary, use the previous diagnostic scan tool session or start a diagnostic scan tool session using the PCM part number or tear tag number located on the PCM.
NOTE: If installing a new BCM, verify at least 2 of the vehicle keys are available prior to carrying out this procedure.
To install, reverse the removal procedure.
NOTE: Some replacement BCM may be in transport or factory mode. Follow the steps to deactivate transport or factory mode.
Deactivate transport or factory mode in the BCM.
Refer to: Transport Mode Deactivation (419-10 Multifunction Electronic Modules, General Procedures).
Refer to: Factory Mode Deactivation (419-10 Multifunction Electronic Modules, General Procedures).
NOTE: Carry out the remaining steps only if installing a new BCM.
NOTE: A diagnostic scan tool should not be used to program keys for this specific step.
Place the first key in the ignition lock cylinder or the backup starting location.
Refer to: Passive Anti-Theft System (PATS) - System Operation and Component Description (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Vehicle System, Description and Operation).
Turn the ignition lock cylinder to the RUN position or press the START/STOP button and wait approximately 6 seconds.
Turn the ignition lock cylinder to the OFF position or press the START/STOP button and remove the first key.
Place the second key in the ignition lock cylinder or the backup starting location.
Turn the ignition lock cylinder to the RUN position or press the START/STOP button.
Carry out the parameter reset.
Refer to: Anti-Theft Security Access and Key Programming - Scan Tool (419-01B Passive Anti-Theft System (PATS), General Procedures).
Refer to: Anti-Theft Security Access and Key Programming - Scan Tool (419-01C Passive Anti-Theft System (PATS) - Vehicles With: Keyless Vehicle System, General Procedures).
Using a diagnostic scan tool, complete the PMI process for the BCM following the on-screen instructions.
Using a diagnostic scan tool, carry out the Configuration Engine Immobilizer (CEI) configuration following the on-screen instructions (Toolbox > Body > Service Functions > CEI Lock Configuration).
Using a diagnostic scan tool, carry out the battery monitor sensor reset following the on-screen instructions (Toolbox > Body > BMS Reset).
NOTE: This step does not apply to vehicles equipped with 360 degree camera view.
If equipped with video rear parking aid, using a diagnostic scan tool, carry out the new module initialization following the on-screen instructions (Toolbox > Electrical > Service Functions > LIN New Module Initialization).
Configure the customer preference programmable parameters.
Refer to: Module Programming (418-01 Module Configuration, General Procedures).
Train the tire pressure sensors.
Refer to: Tire Pressure Monitoring System (TPMS) Sensor Location Calibration (204-04B Tire Pressure Monitoring System (TPMS), General Procedures).
Carry out the BCM self-test (must include an on-demand self-test) and then repeat the self-test to confirm all DTC have been cleared.
If equipped with a PAM, using a diagnostic scan tool, complete the PMI process for the PAM following the on-screen instructions.
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