did a frame off on my 05 sierra and also built a new 408ci for it
the truck is pretty much ready to fire so I went to upload my tune into the truck and keep getting $333 $33 codes
any ideas on what I can try?
I am not even able to check my licence on the truck but tried it on the wifes 05 Tahoe and I was able to check the licence.
any help would be greatly appreciated

thanks, Mitch