'06 SE-R and XM Radio
 

Just picked up an 06 SE-R. I've seen on the NissanUSA site or somewhere that the SE-R is pre-wired for XM Radio. My salesguy was not too helpful with my questions about XM. Is my SE-R prewired? Can I use my current XM Radio Commander unit in my new Sentra without voiding warranty coverage? Thanks