wondering if anybody can give some advice. My factory Delco CD-Radio
has failed. I drive a yukon xl, 2001. The original delco was an RDS
radio-cd. I purchased a kenwood cd-radio and an GMOS1 interface. The
kenwood powers up; but no sound comes from the speakers. The only
thing that works is the onstar. I read in the fine print that the
GMOS1 interface allows replacement of the factory radio (nonRDS) and
maintain the onstar. Any thoughts, suggestions would be appreciated.