It was bone stock when the gaskets went, I did chip it 2 weeks ago with the edge juice and guess what............blown head gaskets again. I will be taking it to the dealer to hopefully have it fixed. I removed all module,attitude and EGT probe. I installed a threaded pipe plug and ground it down flat a liitle black paint and hopefully there will be no issues with the warranty. To be honest I am quite disatisfied with this truck. I know I will not be putting the chip back in and I am considering selling the truck. I now have 28K on it. I am a Chevy guy but wasnt to thrilled buying the duramax (to new) I am thinking a dodge with a manual trans.