Review of scan log

Can some one take a look at my latest scan with my WB hooked up? I know it needs some work but I did not want to start tweaking things until everything was in place. I am looking to make sure I do not have any problems that need to be addressed before I start making changes. To me the knock retard is way out of line, the timing is way off, and I even have some missfires. I was also wanting someone to look at the WB readings to see if they seem OK. Now this is on a non modified 2008 Sierra Denali with only 8000 miles.

Thanks

May i know which grade of fuel you use?plus can you post your tune file please?
Have you done any kind even minor mods like CAI ?

The fuel I have used since I drove it off the lot is 93 octane. No there are no modifications to the engine except for the WB. I will post up the tune file as soon as I get home tonight, but the only things changed from original are the torque setting on the tranny and the speed limiter
Thanks

Here is my current tune, very bare for now. Any help would be great

Thanks

Come on guys any idea if anything is wrong mechanicaly by reading my scan file?