Adding Keys (With SPS)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2020 GMC Yukon XL, 2020 GMC Yukon, 2020 Chevrolet Tahoe, 2020 Chevrolet Suburban, and 2020 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

This procedure may be used with or without existing learned keys being present.
A total of eight keys maybe be learned to a single vehicle.
This procedure will only learn the vehicle key information. This procedure will not learn any immobilizer information between the body control module (BCM) and engine control module (ECM).
If the battery voltage is low, charge the battery before continuing with the procedure.

Connect a scan tool to the vehicle and access SPS.
Ensure that all power consuming devices are turned OFF on the vehicle.
Select the SPS application and follow the on-screen instructions.
Select Reprogram ECU.
Select IMMO Immobilizer Learn - Setup.
Select the Program Transponder or Remote Key (Add) function.
Follow the on-screen instructions.
After programming all keys, "Programming Complete" is displayed.
With a scan tool, clear any DTCs.
Verify each transmitter and key is operating properly. Operate each of the keyless entry functions using the buttons on the transmitter. On vehicles with a keyed ignition switch, verify the mechanical key by starting the vehicle using the ignition switch. When verifying operation, make sure that no other transmitters are near the vehicle.