XM NavTraffic Expands to 22 New 2009 General Motors Vehicle Models

GM's Latest Generation of Navigation Includes XM's Award-Winning Real-Time Traffic Services For Up-To-The-Minute Traffic Intelligence

DALLAS, April 2, 2008 /PRNewswire-FirstCall/ -- XM (NASDAQ: XMSR), the nation's leading provider of satellite radio, today 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.

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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.

  For more information on XM NavTraffic, visit: http://www.xmradio.com/navtraffic
  About XM

XM is America's number one satellite radio company with more than 9 million subscribers. Broadcasting live daily from studios in Washington, DC, New York City, Chicago, Nashville, Toronto and Montreal, XM's 2008 lineup includes more than 170 digital channels of choice from coast to coast: commercial-free music, premier sports, news, talk radio, comedy, children's and entertainment programming; and the most advanced traffic and weather information.

XM, the leader in satellite-delivered entertainment and data services for the automobile market through partnerships with General Motors, Honda, Hyundai, Nissan, Porsche, Ferrari, Subaru, Suzuki and Toyota, is available in 140 different vehicle models for 2008. XM's industry-leading products are available at consumer electronics retailers nationwide. XM programming is also available through XM Radio Online, the exclusive home on the Internet for XM's commercial-free music channels; as downloads of original XM shows via podcasts from XM's Web site or the Apple's iTunes Store; and as streams of commercial- free XM music channels to AT&T and Alltel wireless customers through XM Radio Mobile. For more information about XM hardware, programming and partnerships, please visit http://www.xmradio.com/.

Factors that could cause actual results to differ materially from those in the forward-looking statements in this press release include demand for XM Satellite Radio's service, the Company's dependence on technology and third party vendors, its potential need for additional financing, as well as other risks described in XM Satellite Radio Holdings Inc.'s Form 10-K filed with the Securities and Exchange Commission on 2-28-08. Copies of the filing are available upon request from XM Radio's Investor Relations Department. All programming subject to change.

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CONTACT: Chance Patterson, XM Satellite Radio, +1-202-380-4318,

Web site: http://www.xmradio.com/