Thought some of you DIY installers may like this. I installed a XM tuner into a 2007 4Runner SE. I think all factory head units are XM ready, but not all vehicles have the tuner and antenna installed. I don't really understand this because it is $225 worth of parts that can be installed at time of production in about 25 minutes. To install after production takes 5 to 6 hours. I guess its a real good source of billable labor for the dealers.
Here is the link to my XM Install writeup.
Here is the link to my XM Install writeup.