Have a 2008 gs 460 with mark levinson sound....the stereo system works great, except only the left channel works when in satellite radio mode. All channels work with radio, disc, etc. the problem was intermittent at first, but now every time. Any ideas?

 

left output on the satellite radio unit. There could be a problem with the unit, or a broken connection somewhere on the wire..... Try going to your trunk, upper right corner of the trunk is the SAT unit, wiggle it around and see if the sound comes back.

GL OP!