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5.7L
6.5L (turbo diesel)
- 3.42 axle ratio (opt GU6)
- 3.73 ratio (opt GT4)
- 4.10 ratio (opt GT5)
- 4.56 ratio (opt HC4)
7.4L

Front Axle Assembly for 1999 GMC K2500 Pickup

Fits: 6.5L turbo diesel 3.42 axle ratio opt GU6 (change)

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