I while ago I did an LQ4 4L65 swap from a 2002 Yukon Denali in my 94 K1500. The PCM was modified to run as a stand alone but I have not been able to get the guy who programmed it to communicate back to me. I am having trouble with the o2 sensor monitor not setting. I've looked over the BIN in TunerPro (free version) and compared it to another file, but I can't see or tell what may be wrong. I can see all 4 of the sensors reading data and the truck runs amazing but it won't set that monitor. The truck has the dual header pipes with cats from the donor vehicle as well as the engine wiring harness. Could someone be able to point me in a direction?