Do you have a center dash speaker? If so, you have the Monsoon system and have an amp mounted in the trunk under the rear deck. This will depend on what speakers you get. I use Crutchfield.com to choose what to replace stock speakers with. It allows you to pick whether or not you have Monsoon. The wiring harness you get will need to be spliced to the new head unit wiring harness. Get the harness that retains factory chime. The colors will match up. Just use butt connectors or male to female ones if you want. Some people solder them and then shrink wrap them, but I haven't found it necessary. I've replaced head units and speakers in all 3 GPs I've had so far. One was Monsoon and 2 were not.
