Leo2005 discovered the base model radio has the same SAT radio input as the BOSE:
exchanging-oem-radio-for-a-dealer-remov ... 86917.html
The connectors from left to right:
L - Main Audio connector: speaker outputs, power, etc)
..- AV Unit connector: to Handsfree/Bluetooth module
..- Sat Radio connector: to XM/Sirius Sat Radio module/Optional Cd Changer?
R - Antenna
However, no one here has tried to interface to a base model radio yet to see if it works.
According to Peripheral Electronics, so long as the # on the top right corner of the face of the radio
does not say PY00F, their interface will work. It's quite pricey though at $110.
http://pac-audio.com/productDetails.asp ... egoryID=45
IMHO, put the money towards a better head unit.