ReplacementFor Remote Control PN 13522879, 3544052 FCC ID HYQ2ES Please check the back of your OEM key has this information Frequency 433MHz Key Fob Replacement Suitable for 20202023 CADILLAC T4 T5 T6.Programming MethodThis smart remote key must be programmed by a qualified locksmith and dealer, it is not onboard programming.Assembly Testing1 Key fob with electronic board and battery included and preinstalled Each item has been tested before delivery. 5 Buttons configuration lock, unlock, hatch, remote start, panic.Instructions for UseIt is a 100 Brand New 5Button Keyless Remote Car Key and Blank Key, which needs to be programmed and cut before use if you dont know how to do it, please contact us. This transmitter works on vehicles with push button start.Purchase InstructionsPlease make sure your OEM information including FCC ID, frequency, part number and button appearance are the same as ours and if you dont know, please contact your dealer or us.