2007 Cadillac Escalade Navigation antenna

The info you were sent is for the GPS antenna under the instrument panel pad, you are after the onstar/digital radio antenna. That requires lowering the left front of the headlining, and removing the nut that secures the antenna, the plastic cover does not come off. It should just need the LF visor, and perhaps LF door weatherstrip to lower the headlining enough.

I wont be much help because I spend little time in this area of the vehicle, but you need these options to add bluetooth, There are no provisions to up-fit vehicles with this option. This feature is ONLY available on vehicles built with option UPF, UWE or offered within an equipment option group (i.E LTZ or SLE type package).I dont think they recommend anything specific, if you could contact a GM dealer they might be able to help.

I would have the same information, it is referenced in the following bulletin:
#PIT4864A: Adding Bluetooth Option RPO UPF Or UWE - (Nov 11, 2009)

Subject: Adding Bluetooth  Option RPO UPF Or UWE

Models: 2007-2010 All Passenger Car and Trucks

This PI was superseded to add RPO UWE. Please discard PIT4864.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
Technical assistance has received several calls from dealers requesting assistance to upfit their vehicle to include the Bluetooth feature RPO UPF or UWE

Recommendation/Instructions:
There are no provisions to up-fit vehicles with this option. This feature is ONLY available on vehicles built with option UPF, UWE or offered within an equipment option group (i.E LTZ or SLE type package).

Check your RPO sticker that is inside your glove box door for these options. You might also try a stereo installer, they may have something aftermarket available.