I had a SiriusXM module installed with a new kenwood 6990 two weeks ago. It's really nice other than bad radio reception while car is moving on anything smaller than a 4-lane highway. Two lane roads it is constantly hissing in and out.

I am not entirely certain where they put my antenna but it definitely needs adjustment as I've driven oem sat. radio in different cars on the same two lane roads without a problem. Here is WA state roads have lots of trees but again, other cars w/sat radio have not had this problem. Any suggestions? I'm taking the car back next week and asking for the antenna to be moved but don't know where might work best. Thanks for any info!