There are 26 choices

• SILVERADO 1500 PICKUP
  • Electronic Control Module
    • classic style (creased door skin)
      • (left hand front under battery)
        • hybrid option (opt HP2)
          • below PCM cover
          • on PCM cover (interface)
        • Without hybrid option
          • 4.3L
          • Without 4.3L
    • new style (smooth door skin)
      • (left hand front under battery)
        • 4.3L
        • Without 4.3L
  • Hybrid-Electric
    • (Passenger Side rear engine compartment)
      • (drive motor control)
  • Throttle Control
    • (classic style, creased door skin)
      • (left hand firewall)
• SILVERADO 2500 PICKUP
  • Compressed Natural Gas (CNG)
    • (Passenger Side front engine compartment)
  • Diesel Control
    • classic style (creased door skin)
      • (left hand cylinder head)
        • (glow plug control)
    • new style (smooth door skin)
      • (left hand cylinder head)
        • (glow plug control)
  • Electronic Control Module
    • classic style (creased door skin)
      • (left hand front under battery)
        • diesel
        • gasoline
          • 6.0L
          • 8.1L
    • new style (smooth door skin)
      • (left hand front under battery)
        • 6.0L
        • 6.6L
  • Throttle Control
    • (classic style, creased door skin)
      • (left hand firewall)
• SILVERADO 3500 PICKUP
  • Compressed Natural Gas (CNG)
    • (Passenger Side front engine compartment)
  • Diesel Control
    • classic style (creased door skin)
      • (left hand cylinder head)
        • (glow plug control)
    • new style (smooth door skin)
      • (left hand cylinder head)
        • (glow plug control)
  • Electronic Control Module
    • classic style (creased door skin)
      • (left hand front under battery)
        • diesel
        • gasoline
          • 6.0L
          • 8.1L
    • new style (smooth door skin)
      • (left hand front under battery)
        • 6.0L
        • 6.6L
  • Throttle Control
    • (classic style, creased door skin)
      • (left hand firewall)