One problem related to engine oil leaking has been reported for the 2012 Chevrolet Suburban. The most recently reported issues are listed below.
Oil was changed at approx 72,000 miles. New filter and quaker state full synthetic 10w-30 oil. Current mileage as of oct. 11, 2015 is 78409 miles (15% oil life remaining). I have had to add 8 qts. Of oil so far. There are no visible leaks and exhaust does not smoke excessively. This is definitely not normal. Engine runs good otherwise. I am in the process of making an appointment with gm dealer for diagnosis.