I have a GMC 5.3, 2008.
Oil pump failure at 55,000 miles, damaged the lifters, and had a complete rebuild as a result.
I love the performance, looks, and ride of truck but stories like these on the 5.3's are everywhere.
I traded an F150 5.4 triton with 170,000 trouble free miles in on it. I'll be buying another F150 for my next truck.