I will admit I'm new. But I've used PCM Hammer before without issue. I am doing another swap and bought another running donor truck. 03 Tahoe P59 PCM. Went to delete Vats and disable the usual emissions codes via Universal Patcher, can not get PCM Hammer to read Entire PCM. It is connected, "Read Properties" works fine. Go to "Read Entire PCM", and within one minute it gives me an error for unable to read. Battery voltage is good, plus I have a maintainer on it. I can scan the PCM with my Snap On Scanner and watch live data with the truck running. Anyone have any suggestions I could check/try?