grabby

I've been reading quite a bit to see if you can add factory xm to my lx but cannot seem to find out if you can add xm. I see that you could do it on a ls but nobody seems to know about the truck. I have called the dealer in my area and they really don't know anything either. If anyone has any idea could you let me know. I really would not like to have any additional wires or head units installed.
I have seen an add on thru VAIS Technologies http://www.vaistech.com/faq.php that you can install but would really like the integrated version.
Thanks