Hi guys, I know I will flamed and I know that I need to get my car tuned, but I need at least a starting point. my 05 tahoe engine seized up and since I got that '99 LS1 laying around for years I decided to just slam it in, using all the 5.3 pieces (intake, sensors, exhaust manifolds ..etc), the truck running beautifully and idles fine and smooth, except that its way lean (of course) .. so I thought someone should have done the same and is welling to share his tune file. anyone?