Circuit Control of Retained Accessory Power (RAP)
WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
The RAP supply voltage circuit from the BCM enables the sunroof module and the midgate window switch, if equipped when the vehicle is in RAP mode. The body control module (BCM) keeps the sunroof module enabled during all power modes, except Off-Awake.