GMC 2011 Sierra Denali Owner's Manual page 243

Using the Re dial Command
1. Press and hold
two seconds.
2. After the tone, say Re dial.
Once connected, the person called
will be heard through the audio
speakers.
Receiving a Call
When an incoming call is received,
the audio system mutes and a ring
tone is heard in the vehicle.
Press to answer the call.
Press to ignore a call.
Call Waiting
Call waiting must be supported on
for
the cell phone and enabled by the
wireless service carrier.
Press
incoming call when another call
is active. The original call is
placed on hold.
Press
original call.
To ignore the incoming call, no
action is required.
Press
current call and switch to the call
on hold.
Infotainment System
to answer an
again to return to the
to disconnect the
Three Way Calling
Three way calling must be
supported on the cell phone and
enabled by the wireless service
carrier.
1. While on a call, press
2. Say Three way call.
3. Use the dial or call command to
dial the number of the third party
to be called.
4. Once the call is connected,
press to link all callers
together.
Ending a Call
Press to end a call.
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