I have a base model 2005 Pontiac Grand Prix which has the regular radio 1 disc cd w/ am/fm. Was wondering if it would be possible to install a Monsoon 6 Disc CD Player with XM Radio? Also if it matters both cars have Onstar.
Is this possible to do? Will I have issues with my car not having the monsoon amp & not previously having XM Radio? Is the harness the same?