XM announced at the 2008 Dallas Auto Show the continued expansion of its award-winning real-time XM NavTraffic service into 22 GM vehicles in the 2009 model year.

XM NavTraffic is already the traffic information standard on the highly- praised Cadillac CTS model. XM NavTraffic will expand across the GM vehicle lineup to provide real-time traffic intelligence to 22 navigation-equipped GM vehicles in the 2009 model year. Among the vehicles to offer XM NavTraffic will be navigation-equipped versions of some of GM's most popular models, including the Chevrolet Tahoe, GMC Sierra, Buick Enclave, Saturn Vue and Hummer H2.

Powered by NAVTEQ, XM NavTraffic is the nation's leading real-time traffic service, featuring comprehensive information and coast-to-coast updates every minute. With availability in over 80 major North American markets, XM NavTraffic ensures that drivers have the most current and most detailed traffic and incident information at their fingertips, whether they're commuting or traveling.

"We are proud to partner with GM on their groundbreaking new suite of navigation services," said Steve Cook, executive vice president, automotive, XM Satellite Radio. "Today's car buyers want easy-to-use infotainment that helps them manage an increasingly complex commuting and driving environment. XM NavTraffic will put the best possible intelligence at GM drivers' fingertips."

XM NavTraffic feeds data on incidents, such as accidents and road construction, directly to a vehicle's GPS navigation system via XM's satellite and ground network. The driver is alerted to these incidents through the navigation screen, allowing him or her to route around a jam before getting caught in traffic. Where available, XM NavTraffic provides real-time traffic information by using red, yellow and green color codes to indicate high, medium and low congestion levels.

All XM Radio and XM NavTraffic-equipped General Motors models come standard with a three-month complimentary subscription.