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SiriusXM is planning channels lineup update on May 9th, 2013. SL2x/SL2xMT/SL2xD2/SL3x units will require a Channel List Update as well. Instructions to perform Channel List Update are available on here.
SL2x/SL2xMT/SL2xD2 instructions and SL3x instructions
The SL3x allows you to receive digital XM Satellite Radio directly through the Lexus OEM head unit. You can now control your Satellite Radio Receiver through the vehicle's head unit and audio steering wheel controls and enjoy your Satellite Radio with outstanding sound quality in your car without Cassette Adapters, FM Transmitters or FM Modulators. SL3x provides direct Plug-and-Play connection to '01-'09 Lexus OEM audio system and supports vehicles whether they are equipped with Navigation System or not.