WORKS ON THE FOLLOWING MODELS: Cadillac CT4 2020-2022+ Cadillac CT5 2020-2022+ BUTTONS: Lock Unlock Remote Start Trunk Panic COMPATIBLE FCC ID: YG0G20TB1 COMPATIBLE IC: 4008C-G20TB1 OEM PART #(S): 13538860 13536990 13541988 CHIP: NXP HITAG-PRO ID49 128 Bit FREQUENCY: 433.92 MHz BATTERY: CR2450 EMERGENCY KEY: Included KEYWAY: HU100 REUSABLE: Yes (After Unlocking) COND... https://executivecarkeys.com/collections/cadillac/products/cadillac-ct4-ct5-2020-2022-5-button-smart-key-yg0g20tb1-brk