My wife was driving her 2017 Equinox with 130,000 miles on it and had the same thing happen. The engine didn't seize but all the oil blew out of the rear main seal. She was stuck in -12 deg. weather for an hour until I could get there. The engine has severe damage and will need to be replaced, and when I checked the local boneyard website the three engines they had in stock were sold before I could buy one, indicating we weren't the only ones to have this happen. Now, a different problem has arisen. When I got the car home (towed) I filled the empty crankcase with oil and tried to start the car. It acted like it had a low battery, but the engine light was flashing rapidly. Charging the battery made no difference and now there is no response at all to turning the key- no accessories work, no lights come on, nothing. Is there something in the engine computer that tries to protect the engine (too late) by shutting everything off if starting attempts are made? If so, how do I reset this when I get the new engine put in?