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8.6" ring gear (3.42 ratio, opt GU6)
9.50" ring gear
- AAM built (opt SU7)
  - 3.23 ratio (opt GU5)
  - 3.42 ratio (opt GU6)
- GM built (opt SU8)
  - 3.23 ratio (opt GU5)
  - 3.42 ratio (opt GU6)
9.75" ring gear
- 3.23 ratio (opt GU5)
- 3.42 ratio (opt GU6)
- 3.73 ratio (opt GT4)

Rear Axle Assembly for 2020 Chevrolet Silverado 1500 HD

Fits: 9.75 ring gear 3.23 ratio opt GU5 (change)

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