Only, Xtool, Autopropad, OBDSTAR and SPS2 will program new GM CAN FD proximity smart keys bypass pin code.
The $500 or less Xtool D7, D8, D9, D9 Pro can do CanFD, even 2023. (Stand alone the D8 & D9 ) (with CanFD the D7). X100 PAD3, A80, A80 Pro will also do this.
D7 does this fine. The D7 didn’t have the CAN FD so you had to get a different cable and use Xtool CAN FD adapter.
Follow CAN FD Models are supported, keep updating
2021+ Buick Envision
2020+ Cadillac CT4/CT5
2022 Cadillac XT4/XT5/XT6
2020+ Cadillac Escalade
2020+ Chevy Corvette
2021+ Chevy Tahoe
2022+ Chevy Silverado
2022 Chevy Suburban
2022 GMC Sierra
2021-2022 GMC Yukon
Here is an example add a smart key to a 2023 Chevrolet Tahoe using Xtool D8.
Connect Xtool d8 with vehicle
Select GM Immobilizer->GM->Chevrolet->USA->Tahoe->2021-2022 (CAN FD)->Free pin code method
Free pin needs to connect network or WiFi hotspot to access online server.
Press Start button once then release.
Read number of keys
Long press Start button to turn on ignition switch
Put a working car key into cup holder
Configure system. This takes 10 minutes. Wait patiently.
Put new key into cup holder and keep other keys away
Check the information on the cluster, it is in learning mode.
Long press the Start button for 2 seconds, check the cluster, if the display does not change, release and hold the start button again (unitl there is a change) then press OK to continue.
it says ready for key number 3 and ready for key number 4
Press OK to continue.
Insert new key and press Start button.
Key learning completed.
Test the new key. Done.
If use OBDSTAR tools, follow procedure here
OBDSTAR Program 2021 GMC YUKON Prox All Keys Lost via CAN FD Adapter