2010 Chevrolet Silverado 5.3 engine. Rebuilt the transmission at 197,000 Mi. and again at 300,000. The 6l80 was/is problematic. Torque converter. The engine never burned or leaked a drop of oil until 400,000 miles when the rear main seal started to leak. I changed the oil every 4000 miles with conventional 5-20 oil. The first water pump replacement was at 412,000 Mi. The only other significant repair was a replacement of a throttle body.

unfortunately, 3 days after replacing the water pump, the engine dropped a single lifter. I could have repaired it, but the cost of repairing it was half of a replacement engine. I ended up going with a Jasper remanufactured engine. I did get this one with the DOD delete. I would have loved to have rebuilt the original engine but the logistics of the remanufactured engine were simpler and quicker. The lifter that failed was one of the dod lifters and I didn't want to deal with that again. So far I'm really happy with the Jasper engine. Initial mileage shows that I have increased my miles per gallon by 2 mi per gallon by deleting the dod. I'll have to monitor that for a while longer to confirm it.

oddly, the Friday before the lifter broke I was standing looking at the running engine with the mechanic who replaced the water pump who was just amazed that the engine ran so well at 412,000 miles.

 

my 2012 has 560,000 miles on it
Just put a napa long block in it 4000 Miles ago, it legit has 560,000 miles on the truck !