A few questions from a buyer to all that have done it.

[HummerNewbie]

You can remove the XM module from the vehicle but the dealer isn't likely to do that to save you a few bucks. You might get them to drop the price by the $350 that it lists at but it would cost them to remove it and drop the since they still have to pay for it.

Yes, line-x has been done on the fenders and grill. Search the site with the find button above and you will find pics of it. I would have to say, it came out great.

Depends on the aftermarket roof rack. Some come with their own mounting hardware and others use the factory cross bows.