I am aware of two e38 pcm's 09 and newer and 06-08. Are 4.3 e38's different? I thought not, but an ebay seller programs to your vin (there are a lot of those on ebay) told me upon receiving my first vin from a 2009 express van, said that I needed to pay an extra amount because that is more expensive of an e38. Ok, its a swap, send for this 2008 LY6 silverado. Again, listing was 4.3 v6, v8 cost more as they are harder to come by. Told him that they are the same v6 and v8. Am I wrong? Ordered brand new for a bricked 2009 Z06. Installed and read it, 2009 v6 saturn vue. Ok, took the bench harness to the dealer and had the stock file loaded. Perfect. Am I missing something? Or is the seller trying to gouge me? Regardless, I asked for a refund. If I need enlightenment, I am certain that someone here will do so.