There are 6 choices

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4.3L (VIN X, 8th digit, opt LU3)
4.8L (VIN A, 8th digit, opt L20)
5.3L
- VIN 0 (8th digit, opt LMG)
- VIN 3 (8th digit, opt LC9)
6.0L (VIN J, 8th digit, opt LZ1, Hybrid)
6.2L (VIN 2, 8th digit, opt L9H)

Engine Assembly for 2010 GMC Sierra 1500

Fits: 4.3L VIN X, 8th digit, opt LU3 (change)

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