I have a question? For those that have the oil consumption issue on the 5.3 AFM engines what piston or pistons have people had issue with the rings seizing up? I just bought a 2007 suburban with the issue and I'm going to start with flushing the engine using Kreen. For the time being I have disabled the afm system by driving in "3". Although not good on gas at lease this V4 mode is out of play. If I'm successful at flushing the engine and stopping the oil consumption then I'll look at purchasing the Range unit to eliminate the V4 mode and be able to use overdrive. Anyhow, I'm curious if the same piston or pistons are involved with the problem for different people. I'm not sure which is my issue yet. I'm going to look at the spark plugs and do a compression test to see if i can identify which is involved. I'm blown away that GM would suggest that the issue is from a poorly designed valve cover baffle. While the baffle may be a design issue in almost every occurrence that i have read about the issue shows up between 50 and 100K miles and they seem to always have piston ring issues. I do believe that the AFM is the culprit and GM can't just kill the AMF without other implications on the commercial side of the business. I really love the truck. I just hope i can resolve the issue. I seem to only be burning about a half a quart in 1500 mils so may i can catch it early enough to free the stuck ring or rings and resole the consumption of oil. Thanks for any feedback.