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SIERRA 3500 PICKUP
- dual rear wheels
  - Chassis Cab (without box)
    - 3.42 ratio (opt GU6)
    - 3.73 ratio (opt GT4)
  - Pickup (with box)
    - 3.42 ratio (opt GU6)
    - 3.73 ratio (opt GT4)
- single rear wheels
  - 3.42 ratio (opt GU6)
  - 3.73 ratio (opt GT4)
SIERRA DENALI 3500
- 6' 6" box
  - 3.42 ratio (opt GU6)
  - 3.73 ratio (opt GT4)
- 8' box
  - dual rear wheels
    - 3.42 ratio (opt GU6)
    - 3.73 ratio (opt GT4)
  - single rear wheels
    - 3.42 ratio (opt GU6)
    - 3.73 ratio (opt GT4)

Rear Axle Assembly for 2023 GMC Sierra 3500 HD

Fits: SIERRA 3500 PICKUP dual rear wheels Pickup with box 3.73 ratio opt GT4 (change)

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