So I went to get my trany flushed yesterday, and in the process of the shop flushing it a hose blew on the machine and frying there machine and pumping a bunch of fluid out of my trany. So they fill it back up and try to give it back to me but I get in it to drive away and the “service engine soon” light is on. So I tell the guy and tack it for a short drive to see if everything feels ok, get back still on so they try and plug in a code reader and get nothing, no power. So the question is, is the trany guna be fine with having that much fluid pumped out of it while running, and can you not use a regular OBD II on the Duramax? And sorry if this needs to be in the trany section but my main concern was the OBD II port not working that’s why I put it here.