We have a 2000 chevy 2500 here at my shop. We swapped the black box out of because the customer had a 496 built for it, we had built the 4l80e for him. Well the engine shop "dyno tuned" the black box and killed the converter because theres no way to keep it from locking up under WOT. Everything wiring wise went well for the swap. Truck fired right up, but no matter what we do the truck starts to run off lean on the left bank. The right bank however is not running off rich. We still verified the o2 sensors are on the correct banks, the injector wiring has been verified, and even changed to make sure it wasnt an issue we caused. Made sure the injector bank assignment was correct for the swap. pretty much went over the entire thing and cant figure out whats wrong. Also made sure it has the correct OS that everyone swears on. Here is the tune, or if anyone else has any insite to offer. Thanks, Logan