There are 45 choices

• SIERRA 1500 PICKUP
  • 4x2
    • 119" wheelbase (Regular Cab, 6' 6" box)
      • (Automatic Transmission)
        • 4 speed (opt M30)
        • 6 speed (opt MYC)
    • 133" wheelbase (Regular Cab, 8' box)
      • (Automatic Transmission)
        • 4 speed (opt M30)
          • 3.23 ratio (opt GU5)
            • speedometer calibration (opt VZ2)
            • Without speedometer calibration
          • 3.42 axle ratio (opt GU6)
            • speedometer calibration (opt VZ2)
            • Without speedometer calibration
          • 3.73 ratio (opt GT4)
        • 6 speed (opt MYC)
    • 143.5" wheelbase
      • Crew Cab
        • hybrid option (opt HP2)
        • Without hybrid option
          • (Automatic Transmission)
            • 4 speed (opt M30)
            • 6 speed (opt MYC)
              • 5.3L
              • 6.2L
      • Extended Cab
        • (Automatic Transmission)
          • 4 speed (opt M30)
          • 6 speed (opt MYC)
            • 6.2L
            • Without 6.2L
    • 157.5" wheelbase (Extended Cab, 8' box)
      • (Automatic Transmission, 6 speed, opt MYC)
        • ID 7379
        • ID AAJ5
        • ID AALA
        • ID AALS
        • ID AATR
  • 4x4
    • 119" wheelbase (Regular Cab, 6' 6" box)
    • 133" wheelbase (Regular Cab, 8' box)
    • 143.5" wheelbase
      • Crew Cab
        • hybrid option (opt HP2)
        • Without hybrid option
          • ID AACJ
          • ID AACL
          • ID AACM
          • ID AAJG
          • ID AALW
          • ID AALX
          • ID AAMF
          • ID RH7
          • ID SK1
      • Extended Cab
        • hybrid option (opt HP2)
        • Without hybrid option
          • ID AACJ
          • ID AACL
          • ID AACM
          • ID AAJG
          • ID AALW
          • ID AALX
          • ID AAMF
          • ID RH7
          • ID SK1
    • 157.5" wheelbase (Extended Cab, 8' box)
• SIERRA DENALI 1500
  • 4x2
  • AWD