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10.50" ring gear
- active brake control (opt JL4)
  - 3.73 ratio (opt GT4)
  - 4.10 ratio (opt GT5)
- Without active brake control
  - 3.73 ratio (opt GT4)
  - 4.10 ratio (opt GT5)
11.50" ring gear
- (3.73 ratio, opt GT4)
  - active brake control (opt JL4)
  - Without active brake control

Rear Axle Assembly for 2010 GMC Sierra 2500 HD

Fits: 10.50 ring gear active brake control opt JL4 3.73 ratio opt GT4 (change)

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