Interactions through Feb ‘11

OnStar Vehicle OnStar Vehicle Diagnostics - Diagnostics - OverOver 173 Million Emails 173 Million EmailsSent Sent

Good Good SamaritanSamaritan503,000503,000

Cumulative Subscriber Interactions (North America)

Automatic CrashAutomatic CrashResponse OverResponse Over162,000162,000

Emergency Emergency Services Over Services Over 1 million1 million

Roadside Roadside Assistance Assistance 2.6 million2.6 million

On-Demand On-Demand DiagnosticsDiagnostics4.3 million4.3 million

Stolen VehicleStolen VehicleAssistanceAssistance54,40054,400

Turn-by-TurnTurn-by-TurnRoutes Delivered*Routes Delivered*Over 72 millionOver 72 million

Remote DoorRemote DoorUnlock - Unlock - OverOver5.1 million5.1 million

OnStar Hands-Free OnStar Hands-Free CallingCalling - Over - Over2.6 Billion Minutes** 2.6 Billion Minutes** PurchasedPurchased

One VeryOne VeryHardworking ButtonHardworking Button350 Million 350 Million CumulativeCumulativeService InteractionsService Interactions

*Includes Advisor and TBT delivered routes

*Includes Unlimited Bundle Sales

OnStar Mobile OnStar Mobile ApplicationsApplications – – Over 1,146k Over 1,146k DownloadsDownloads

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

OnStar Vehicle OnStar Vehicle Diagnostics - Diagnostics -Over Over 3.7 3.7 Million EmailsMillion EmailsSent Sent

Good Good SamaritanSamaritan6,800/Month6,800/Month

Monthly Subscriber Interactions (North America)

Automatic CrashAutomatic CrashResponseResponse2,600/Month2,600/Month

Emergency Emergency Services Services 10,000/Month10,000/Month

Roadside Roadside AssistanceAssistance33,000/Month33,000/Month

On-Demand On-Demand DiagnosticsDiagnostics58,500/Month58,500/Month

Stolen VehicleStolen VehicleAssistanceAssistance450/Month450/Month

Turn-by-TurnTurn-by-TurnRoutes Delivered*Routes Delivered*Over 1.6 Million Over 1.6 Million Routes/MonthRoutes/Month

Remote DoorRemote DoorUnlockUnlock OverOver 58,900/Month58,900/Month

OnStar Hands-Free OnStar Hands-Free Calling - Over Calling - Over 72 Million Minutes** 72 Million Minutes** Purchased/MonthPurchased/Month

*Includes Advisor and TBT delivered routes

**Includes Unlimited Bundle sales

One VeryOne VeryHardworking ButtonHardworking Button350 Million 350 Million CumulativeCumulativeService InteractionsService Interactions

OnStar Mobile OnStar Mobile ApplicationsApplications – – Over 392k Over 392k DownloadsDownloads

3 Month Rolling Average (Dec ’10 - Feb ‘11)

Good Good SamaritanSamaritan350/Month350/Month

Monthly Subscriber Interactions - Canada

Automatic CrashAutomatic CrashResponseResponse180/Month180/Month

Emergency Emergency Services Services 310/Month310/Month

Roadside Roadside AssistanceAssistance1000/Month1000/Month

On-Demand On-Demand DiagnosticsDiagnostics5,600 Month5,600 Month

Stolen Vehicle Stolen Vehicle AssistanceAssistance30/Month30/Month

Turn-by-TurnTurn-by-TurnRoutes Delivered*Routes Delivered*58,600/Month58,600/Month

Remote DoorRemote DoorUnlockUnlock 3,400/Month3,400/Month

OnStar Hands-OnStar Hands-Free CallingFree CallingOver 6.8 Million** Over 6.8 Million** Minutes/MonthMinutes/Month

One VeryOne VeryHardworking ButtonHardworking Button350 Million Cumulative 350 Million Cumulative Service Interactions (North America)Service Interactions (North America)

OnStar Vehicle OnStar Vehicle Diagnostics Diagnostics Over 270,000 Over 270,000 Emails Sent Emails Sent

*Includes Advisor and TBT delivered routes

**Includes Unlimited Bundle sales