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Crew Cab
- 6 lug wheel
- 8 lug wheel
  - Quadrasteer (opt NYS)
    - 3.73 ratio (opt GT4)
    - 4.10 ratio (opt GT5)
  - Without Quadrasteer
    - 3.73 ratio (opt GT4)
    - 4.10 ratio (opt GT5)
Extended Cab
- Quadrasteer (opt NYS)
  - 3.73 ratio (opt GT4)
  - 4.10 ratio (opt GT5)
- Without Quadrasteer
  - 3.23 ratio (opt GU5)
    - hydraulic power brakes (opt JH1)
    - vacuum brake booster (opt JF7)
  - 3.42 ratio (opt GU6)
    - hydraulic power brakes (opt JH1)
    - vacuum brake booster (opt JF7)
  - 3.73 ratio (opt GT4)
    - 8.6" ring gear
      - hydraulic power brakes (opt JH1)
      - vacuum brake booster (opt JF7)
    - 9.5" ring gear (opt AXN)
  - 4.10 ratio (opt GT5)
Regular Cab
- 4x2
  - 3.23 ratio (opt GU5)
    - hydraulic power brakes (opt JH1)
    - vacuum brake booster (opt JF7)
  - 3.42 ratio (opt GU6)
    - hydraulic power brakes (opt JH1)
    - vacuum brake booster (opt JF7)
  - 3.73 ratio (opt GT4)
    - hydraulic power brakes (opt JH1)
    - vacuum brake booster (opt JF7)
- 4x4
  - 3.42 ratio (opt GU6)
    - hydraulic power brakes (opt JH1)
    - vacuum brake booster (opt JF7)
  - 3.73 ratio (opt GT4)
    - hydraulic power brakes (opt JH1)
    - vacuum brake booster (opt JF7)
  - 4.10 ratio (opt GT5)

Rear Axle Assembly for 2005 GMC Sierra 1500

Fits: Regular Cab 4x4 3.73 ratio opt GT4 vacuum brake booster opt JF7 (change)

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