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Re: 4.8 gm interchange
Posted to Technical Discussion Forum on 1/1/2020 1 Reply

A 2006 Silverado 4.8 L engine should be a vin V (8th digit) and RPO code LR4. It is a Gen 3 engine and was used from 1999 to 2006 with minor changes. Year 2007 is a split year with some engines Gen 3 and some Gen 4, which would be different RPO code, probably ... Login to read more.

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