We just finished up a gen 3 4.8 to gen 4 LS3 swap, and we got it all wired up and used a x link to connect the 8 pin TB to the 6 pin TB that the ls3 uses. We went ahead and uploaded a base tune and the truck holds idle but it's not where I commanded it on the tune and we have codes: P0220 p1516 p2135 p0120, and a reduced engine power sign. Any help to this is greatly appreciated this is on a 06 Silverado... ill post the file that's in the truck as soon as I can. thank you for the help in advance