I just purchased the factory Sirius radio, antenna, wiring, etc. for my 2003 6MT Coupe and am looking for some advice on whether to tackle this install myself or take it to a professional. Does anyone have any advice or know of a thread describing an install? Thanks

 

There are many threads here and Fresh Alloy on how to do this. I haven't done it but it doesn't sound to tough.

 

See this post on G-Owners forum. Skip down past the intro stuff on wiring the harness (assuming yours is prewired).

 

If you are pre-wired and you mount the antenna on the rear deck it's really easy do it yourself. Just download the factory intructions from grubbs; and if you need rear deck install help just make a post.