Took my 2015 4.3 silverado in to have the oil control solenoid replaced. Had to wait a full week before part showed up at the dealership. Once part arrived they waited three more days to start on the repair, which takes 8 to 10 service hours. The truck has been in the dealership for 15 days now. Today I was informed that the instrument cluster won't turn on. Would having the battery unplugged for that long cause this problem or if something was plugged back in wrong? I haven't gotten any answers from their service department. I found out through the parts department that this is a problem. What's your take on this?