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Re: GM 5.3L Gen III To Gen IV Swap
Posted to Technical Discussion Forum on 10/17/2013

Hey Robert,

My interchange system ( Hollander ) is saying that engine wont work. Doesn't say why, and that doesn't mean it wont work. Im thinking Active fuel management (shuts down 4 cyl) started in the newer bodied trucks in 2007 and that might be the main ... Login to read more.