ONSTAR
OnStar is a core asset of your Sierra. Benefiting from more than a decade of innovative development, it is both a highly advanced technology—fully integrated within the vehicle—and a warm human service. Standard on most Sierra models is one year of the OnStar Safe  amp; Sound plan, including the convenience and safety of Hands-Free Calling. It also includes Automatic Crash Response (see page 26), Stolen Vehicle Assistance, link to Emergency Services, Roadside Assistance, Remote Door Unlock, OnStar Vehicle Diagnostics, Crisis Assist and Remote Horn and Lights. OnStar services require vehicle electrical system (including battery), wireless service and GPS satellite signals to be available and operating for features to function properly. OnStar acts as a link to existing emergency service providers. Subscription Service Agreement required. Call 1-888-4ONSTAR (466-7827) or visit onstar.com for OnStar’s Terms and Conditions, Privacy Policy, details and system limitations.

XM RADIO
On all Sierra models except WT: XM Radio is standard with 3 trial months of service. XM turns your drive on with commercial-free music channels from virtually every genre, artist-dedicated channels, live performances and more. Tune in to live play-by-play from the biggest sports, exclusive entertainment from top personalities, compelling talk, hilarious comedy, worldclass news, local traffic and weather and family-friendly programming. Everything worth listening to is now on XM. Visit gm.xmradio.com for details.

XM NAVTRAFFIC
Included with the available Touch-Screen Navigation System, XM NavTraffic enhances Sierra’s GPS navigation system by showing real-time traffic data—while you’re driving. Available in over 80 markets, XM NavTraffic displays construction, road closures and accidents so that you can get to your destination faster, plus average traffic speed and estimated drive time in select markets. For more information, visit xmradio.com/navtraffic.