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4x2
- model VIN C (5th digit)
  - 6 lug wheel
    - 3.42 axle ratio (opt GU6)
    - 3.73 ratio (opt GT4)
    - 4.10 ratio (opt GT5)
    - 4.56 ratio (opt HC4)
  - 8 lug wheel
- model VIN R (5th digit)
4x4
- 6 lug wheel
- 8 lug wheel

Rear Axle Assembly for 1989 GMC P2500

Fits: 4x2 model VIN C 5th digit 6 lug wheel 4.10 ratio opt GT5 (change)

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