Just got the tahoe back from getting a tune. Now around 3300 tune it shudders and doesnt pull through the rpm band. We had dod deactivated and enabled vvt. Does anyone know when vvt activates and do you think we crossed the 2 additional wires? On the pcm diagram I found 16 and 51/54? to be the only 2 cam sensor wires that were open. Does anyone know the exact pin numbers? The tuner mentioned a possible bad o2. Could that be the culprit? Any help is greatly appreciated