There are 22 choices

• Air Bag
  • (below left hand front seat)
• Body Control (BCM)
  • (under steering column)
• Communication
  • (OnStar, opt UE1)
    • (center dash, behind radio)
• Door
  • (left hand rear quarter panel)
    • (power liftgate, opt E61)
      • ID 15912910
      • ID 15936452
      • ID 20808858
      • ID 25824256
      • ID 25845783
      • ID 25880968
• Driver Side Assist
  • (below Passenger Side front seat)
    • park assist
    • rear view camera
• Fuel Pump
  • (left hand frame rail)
• Memory
  • (under Driver Side seat)
    • ID 15786696
    • ID 15921044
    • ID 25855630
    • ID 25862038
    • ID 25896778
• Stability Control
  • (center console)
    • (yaw rate control)
• Suspension
  • (rear quarter)
    • Magneride chassis (opt Z95)
    • real time damping chassis (opt Z55)
• Transfer Case
  • (left hand dash)
• Transmission
  • (next to battery)