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Product Description
The 4+1 Buttons HYQ2ES Smart Car Key is a premium remote solution designed for 2020-2021 Cadillac XT4, XT5 and XT6 models. Available in both aftermarket and OEM versions, this Cadillac smart key stands out with its exclusive rear start function, in addition to the standard lock, unlock, hatch release and panic functions. Equipped with a 46E Chip and 433MHz frequency, it ensures stable signal transmission and seamless integration with Cadillac’s onboard systems. The key comes with a HU100 key blade for emergency manual access, making it a reliable replacement or spare key for Cadillac owners. Its ergonomic design fits comfortably in the hand, and the durable shell resists scratches and drops, catering to the high-quality demands of Cadillac drivers.
Parameter | Details |
FCC ID | HYQ2ES |
P/N | 13522879 |
IC | 1551A-2ES |
Chip Type | 46E Chip |
Button Functions | Lock, Unlock, Rear Start, Hatch, Panic |
Frequency | 433MHz |
Battery Type | CR2032 |
Key Blade Type | HU100 |
Product Type | Aftermarket, OEM |
Compatible Models | 2020-2021 Cadillac XT4, 2020-2021 Cadillac XT5, 2020-2021 Cadillac XT6 |
The unique rear start button allows you to start your Cadillac’s engine remotely. This is especially useful in extreme weather: you can pre-heat the cabin in winter or pre-cool it in summer before getting in.
The built-in 46E Chip supports secure code verification between the key and the vehicle. It ensures that only authorized keys can operate the vehicle, enhancing anti-theft performance.
Running on 433MHz frequency, the key offers a longer operating range compared to lower-frequency alternatives. It works effectively even in areas with mild signal interference, ensuring responsive command execution.
The included HU100 key blade enables manual door unlocking when the key battery is dead or the smart function fails. It adds an extra layer of convenience for unexpected situations.
The HYQ2ES Cadillac smart key operates through two core mechanisms: RF communication and chip authentication, with an additional module for rear start. When you press a function button, the key emits a 433MHz RF signal encoded with the 46E Chip’s unique ID. The vehicle’s receiver decodes the signal and checks the ID against the pre-programmed list. For the rear start function, the key sends a special signal that triggers the vehicle’s engine control unit (ECU) to start the engine, while simultaneously activating the climate control system based on external temperature. The HU100 key blade serves as a backup, allowing manual lock/unlock by inserting it into the door lock cylinder when the smart function is unavailable.
Both aftermarket and OEM versions require professional programming. We recommend visiting an authorized Cadillac service center or a qualified car locksmith to ensure full compatibility.
The HU100 key blade may need to be cut to match your vehicle’s door lock. A professional locksmith can complete this cutting process quickly.
Press the unlock button once to unlock the driver’s door; press it again within 5 seconds to unlock all doors. You can customize the key to unlock all doors with a single press via the vehicle’s settings.
When using the rear start function, the parking lamps will turn on automatically, and the doors will remain locked. The climate control system, rear defog and heated/ventilated seats (if equipped) will activate based on outside temperature.
Hold the unlock button for 1 second to unfold the side mirrors (if the function is enabled). Press and hold the button longer to open the windows automatically.
The rear start function has a standard operating range. For optimal performance, use it within 30 feet of your Cadillac vehicle.
No, this key is only compatible with 2020-2021 Cadillac XT4, XT5 and XT6 models. Please confirm your vehicle’s model year before purchase.
Yes, the OEM version of the HYQ2ES key is manufactured to the same specifications as the original key that comes with the vehicle. It offers the same performance and durability.
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