Originally Posted by VT2CA
Exactly, the base model LS, 1LT, and 1SS do not automatically come equipped with bluetooth phone support. As shown in my writeup there are two separate onstar modules. to get bluetooth phone from the factory in base model cars you must order the convenience and connectivity package ($750)
If you're like me and don't care about connecting an ipod but do want phone support than for about a tenth of the price of the C&C package you can do the above procedure and switch your onstar box to one with bluetooth.
To add to that, the C&C package is not available for the 1SS so the ONLY way to add it is this (or some other aftermarket solution).