1. Good Samaritan 503,000 Cumulative Subscriber Interactions (North America) Emergency Services Over 1 million Automatic Crash Response Over 162,000 Remote Door Unlock - Over 5.1 million Roadside Assistance 2.6 million Stolen VehicleAssistance 54,400 Turn-by-Turn Routes Delivered* Over 72 million OnStar Vehicle Diagnostics - Over 173 Million Emails Sent On-Demand Diagnostics 4.3 million One Very Hardworking Button 350 Million Cumulative Service Interactions OnStar Hands-Free Calling - Over 2.6 Billion Minutes** Purchased OnStar Mobile Applications – Over1,146k Downloads Interactions through Feb ‘11 *Includes Advisor and TBT delivered routes *Includes Unlimited Bundle Sales

2. Good Samaritan 6,800/Month Monthly Subscriber Interactions (North America) Emergency Services 10,000/Month Automatic Crash Response 2,600/Month Stolen VehicleAssistance 450/Month Remote Door UnlockOver58,900/Month Roadside Assistance 33,000/Month Turn-by-Turn Routes Delivered* Over 1.6 Million Routes/Month OnStar Vehicle Diagnostics -Over 3.7 Million Emails Sent On-Demand Diagnostics 58,500/Month One Very Hardworking Button 350 Million Cumulative Service Interactions OnStar Hands-Free Calling - Over 72 Million Minutes** Purchased/Month OnStar Mobile Applications – Over392k Downloads *Includes Advisor and TBT delivered routes **Includes Unlimited Bundle sales All statistics are 3 Month Rolling Average (Dec ‘10 - Feb ‘11) except for Mobile apps which is for the month of February U.S. and Canada

3. Good Samaritan 350/Month Monthly Subscriber Interactions - Canada Emergency Services 310/Month Automatic Crash Response 180/Month Remote Door Unlock3,400/Month Roadside Assistance 1000/Month Stolen Vehicle Assistance 30/Month OnStar Vehicle Diagnostics Over 270,000 Emails Sent On-Demand Diagnostics 5,600 Month Turn-by-Turn Routes Delivered* 58,600/Month One Very Hardworking Button 350 Million Cumulative Service Interactions (North America) OnStar Hands-Free Calling Over 6.8 Million** Minutes/Month *Includes Advisor and TBT delivered routes **Includes Unlimited Bundle sales 3 Month Rolling Average (Dec ’10 - Feb ‘11)