Had cylinder 7 miss fire due to ring oil problem. Found out the suburban 2010-2014 have class action against GM for this engine problem. The suit alleges the 5.3L V8 engines found in a number of 2010-2014 model year GM vehicles have flawed piston rings that don't maintain tension well enough to keep oil in the crankcase. ... The active fuel management compounds the oil burn problem, as well. What will GM due to fix the engine? I know of Suburbans that run for 200,000 mile with out a problem. Mine has 46,000! John Landwehr
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