Ive heard and read abot this problem i think it was 07 or 08 to 13 or 14. My brother in law had an 09 crew 4x4 and he had to litterally carry oil with him everywhere he went. Had another buddy with a 10 and his was the same way, they just used a ton of oil. Now id say pretty much anything before that would probly run forever...im a super fan of a 99-02 5.3...dang moters are indestructible if maintained well.
I work with my father-in-law so when the company gets HIM a new truck I get his old one.
In 2007 I took over a 2001 Silverado with the 5.3 and that engine was purring like a kitten at 300K miles. Great truck.
In 2013 I took over my current ride, a 2007 GMC Sierra with the 5.3 AFM. Stated consuming oil at 50K miles. GMC dealership did all sorts of tests and tracking on it but could not pinpoint the problem...this was right when all the issues first came out. The TSB came out with a fix but GMC would not cover this truck because of the mileage on it. I've heard form different people who got the new valve cover that it doesn't always fix the issue. I always keep 3-4 quarts of oil in my toolbox. Depending on my driving if I have lot of interstate time where the 4 cyl will kick in often, I'll have to add 3-4 quarts every 5,000 miles. Engine has 216,000 on it and this began at 50K. Otherwise I love the truck.
