There are 47 choices

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SUBURBAN 10
- 4x2
  - 10 bolt cover
  - 12 bolt cover
- 4x4
SUBURBAN 1500
- 4x2
  - 10 bolt cover
  - 12 bolt cover
- 4x4
SUBURBAN 20
- 4x2
  - 3.21 ratio (opt HC8)
  - 3.42 axle ratio (opt GU6)
  - 3.73 ratio (opt GT4)
  - 4.10 ratio (opt GT5)
  - 4.56 ratio (opt HC4)
- 4x4
SUBURBAN 2500
- 4x2
- 4x4

Rear Axle Assembly for 1978 GMC Suburban

Fits: SUBURBAN 20 4x2 3.21 ratio opt HC8 (change)

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