My four cylinder 2011 Equinox with 85,000 miles has had nearly every problem known to occur to the early edition of the model. Virtually all of the problems were covered by warranty and the service and cooperation of my local dealer has been excellent. I really like the features of the car and would like to keep it to 160,000 miles. The oil life monitor was repaired under recall but not until I had at least two very long oil change intervals. Also the high pressure fuel pump had the leak which allowed gasoline to seep into the crankcase. This was also repaired under warranty. Most recently the pistons and rings were replaced (under warranty) because of excessive oil consumption, which I suspect was related to the two previous issues. Within the first tankful of gasoline the check engine light came on. The mechanic reset it once after determining the problem was either a bad O2 sensor (after the catalytic converter) or actually a bad catalytic converter. After the light came on again, the mechanic believes it is because of a bad converter. Cost to replace the converter is approximately $1,000 and they will see if GM will cover some of the cost even though we are past the 80,000 mile emissions control warranty. I think the dealer suspects the series of engine problems contributed to or caused the catalytic converter problems. One other variable is that I authorized the dealer to use an induction cleaner to deal carbon deposits when they finished the pistons & rings. I wondered if the induction treatment was the cause of the catalytic converter failure. Also, is it possible that burning the excess oil coated the converter?