Modern automotive convenience is epitomized by smart access systems. With Cadillac’s Keyless Open and Keyless Start technologies, drivers can seamless unlock doors, access the cargo areas—including the innovative eTrunk™ or Power Hood on equipped electric vehicles—and start the engine without ever removing the key fob from a pocket or bag.
This comprehensive guide covers everything you need to know about operating, personalizing, and troubleshooting your Cadillac passive entry system to ensure a seamless premium driving experience.
Personalizing and Adjusting Keyless Open
The passive entry system operates via proximity sensors that detect your key fob when it is within a three-foot range of the vehicle. By default, pressing the button on the driver’s door handle once will unlock that specific door. Pressing the button a second time within five seconds commands the vehicle to unlock all remaining doors.
Operating Flush Exterior Door Handles
Select luxury models, such as the Cadillac LYRIQ, feature flush exterior door handles that require a slightly different interaction method. To operate these aerodynamic handles:
- Ensure the key fob is within three feet of the door.
- Press the larger end of the driver’s door handle once to unlock the door.
- Press the handle again to unlatch and open it.
How to Enable or Disable Keyless Open
If you prefer to lock and unlock your vehicle manually using the key fob buttons, you can deactivate the passive entry system using either your center infotainment display or the key fob itself.
- Via Center Display: Navigate to Settings > Vehicle > Remote Lock, Unlock, Start > Passive Door Unlock and toggle the setting to Off or On.
- Via Key Fob: With the vehicle ignition turned completely off, press and hold both the Lock and Unlock buttons on the key fob simultaneously for three seconds. The turn signal lamps will flash four times to confirm the feature is disabled, or two times to confirm it has been enabled.
Welcome and Walkaway Lighting Dynamics
When your luxury vehicle detects the key fob within the three-foot proximity boundary, it initiates the Welcome Lighting sequence. On premium trims, the exterior door handles also illuminate to guide your entry. Conversely, turning off and exiting the vehicle triggers Walkaway Lighting. The sophistication of these lighting visual effects varies from standard illumination to choreographed animations depending on your specific model. Adjustments can be managed directly through the vehicle’s infotainment system.
Customizing General Personalization Settings
Cadillac allows drivers to tailor an array of security and convenience options to their exact preferences. To access these settings, tap Settings on the center display, select Vehicle, and choose either Remote Lock, Unlock, Start or Power Door Locks.
The following parameters can be customized within this sub-menu:
- Passive Locking: Automatically locks all doors and the liftgate/trunk after you turn off the vehicle, exit with the key fob, and close all doors.
- Passive Unlocking: Sets whether only the driver’s door or all doors unlock upon the first press of the door handle button.
- Remote Door Unlock: Changes which doors unlock when pressing the physical Unlock button on the key fob.
- Remote Left in Vehicle Alert: Sounds a quick horn chirp if the key fob is accidentally left inside the cabin after exiting.
- Remote Removed From Vehicle Alert: Alerts the driver via horn chirps if the key fob leaves the vehicle perimeter while the powertrain is still active.
- Remote Unlock Light Feedback: Configures the exterior lights to flash when utilizing the remote unlock feature.
- Remote Lock Feedback: Selects whether the exterior lights flash, the horn sounds, or both occur when locking the vehicle via the fob.
Managing a Dead Key Fob Battery or Weak Signal
If your key fob experiences a depleted battery or signal interference, you can still easily access and start your vehicle using a physical backup method.
Unlocking the Driver’s Door Manually
- Press the small release button located on the side or back of the key fob housing while pulling the key ring end outward. This reveals the integrated mechanical key.
- Locate the small slot on the lower right side of the driver’s exterior door handle cover.
- Insert the mechanical key into this slot and push upward firmly until the protective cover pops off.
- Insert the mechanical key directly into the newly exposed lock cylinder and turn it clockwise until it stops.
- Turn the key back counterclockwise slowly while pulling the door handle to unlatch the door. The handle cover can be snapped back into position once open.
Note for Rear Liftgates: On select sport-utility vehicles equipped with a physical lock cylinder on the liftgate, insert the key fully into the cylinder, turn until it clicks, remove the key, and re-insert to cycle the lock mechanism.
Starting the Vehicle with a Low Fob Battery
If your vehicle fails to detect the smart key due to a weak battery, the Driver Information Center (DIC) will display a message indicating that no key fob is detected.
To start the engine:
- Place the key fob directly into the designated key pocket (or transmitter slot). The location of this pocket varies by model—commonly found inside the center console storage or cup holders. Consult your Owner’s Manual for the exact location.
- Depress the brake pedal firmly.
- Press the Engine Stop/Start button to clear the DIC alert and start the powertrain.
References and Owner Resources
For further reading on vehicle security systems, advanced anti-theft properties, or standard operation, please consult these specialized resources:
- Cadillac Vehicle Support. (2026). How to Operate Keyless Open and Start Systems.
- Cadillac Owner Center. (2026). Advanced Theft Deterrent Features and Customization.
- General Motors. (2026). Cadillac Owner’s Manuals and Driving Guides.