For your information

Lexus GX / Lexus GX Owners Manual / For your information

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Programming HomeLink® (for U.S. owners)
The HomeLink® compatible transceiver in your vehicle has 3 buttons which can be programmed to operate 3 different devices. Refer to the programming method below appropriate for the device. 1. ...

Initialization
Items to initialize The following items must be initialized for normal system operation in cases such as after the 12-volt battery is reconnected, or maintenance is performed on the vehicle. ...

Shuffle playback
 - Playing songs from one playlist or album in random order Press the 1 (RAND) button. To cancel, press the 1 (RAND) button again.  - Playing songs from all the playlists or albums in ran ...