I'm not sure this will work... I may be wrong, but I believe that the SDAR unit takes it's can bus connection from some place else.. ( i.e. not from the plug at the radio )... If this is the case, you won't get audio, but you'll still have SDAR on the CAN bus, and thus.. the AAI-CHY won't work.. You'll still need to pull the trim and disconnect the SDAR unit...jaak said:Disconnect it at the back of the radio... You really don't want to pull all the trim off! The Sat plugs in the same way the Pac unit does...