The vins are different obviously but honestly I don't think there is going to be much difference on the engine side. I have an LBZ and there is a lot of common parts through 2010. Both use the CP3 injection pump. The major difference in the power train is the introduction of a DPF. If it's just an engine without the exhaust then this wont be present. Assuming you have the ECM's if you know anyone that does tuning with an EFI live setup where you could connect the ECM on a bench. They would be able to tell you what engine it was then.
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