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SIERRA 1500 PICKUP
- 8.6" ring gear (10 bolt)
  - hybrid option (opt HP2)
  - Without hybrid option
    - active brake control (opt JL4)
    - Without active brake control
- 9.5" ring gear (14 bolt)
  - 3.42 ratio (opt GU6)
  - 3.73 ratio (opt GT4)
SIERRA DENALI 1500
- 8.6" ring gear (10 bolt)
- 9.5" ring gear (14 bolt)

Rear Axle Assembly for 2013 GMC Sierra 1500 HD

Fits: SIERRA 1500 PICKUP 9.5 ring gear 14 bolt 3.73 ratio opt GT4 (change)

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