Buick 2010 Lacrosse Owner's Manual page 209

5. Once a phone has been deleted,
the only way to connect back to
that phone is to pair the phone
again. See Bluetooth Pairing
earlier before the process is
started.
Linking to a Different Phone
In order to link to a different phone,
the new phone must be in the
vehicle and available to be
connected to the Bluetooth system
before the process is started.
1. Press the CONFIG hard key
repeatedly until the Phone menu
is shown or touch the Phone tab
on the screen.
2. Select the Bluetooth submenu.
Infotainment System
3. Select the Device List submenu.
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