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(rear wheel ABS, no sensor on rear axle)
- 4x2
  - 2.73 ratio (opt GU2)
  - 3.08 ratio (opt GU4)
  - 3.42 axle ratio (opt GU6)
  - 3.73 ratio (opt GT4)
  - 4.11 ratio (opt H04)
- 4x4
  - 3.08 ratio (opt GU4)
  - 3.42 axle ratio (opt GU6)

Rear Axle Assembly for 1990 GMC S15 Pickup

Fits: rear wheel ABS, no sensor on rear axle 4x2 3.73 ratio opt GT4 (change)

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