| Figure 1:  | 
 Vehicle Interface Unit (VIU) (Gen 1 -- Dealer Installed)
  
 
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| Figure 2:  | 
 Vehicle Communication Unit (VCU) and Floor Handset (Gen 1 -- Dealer
Installed)
  
 
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| Figure 3:  | 
 Vehicle Interface Unit (VIU) (Gen 2 -- Factory Installed)
  
 
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| Figure 4:  | 
 OnStar® Controls, VIU (Gen 2 -- Factory Installed)
  
 
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| Figure 5:  | 
 Vehicle Communications Unit (VCU), Antenna (Gen 2 -- Factory Installed)
  
 
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