I found out today that the LB7 turbo gets its oil from the #4 camshaft bearing. If the bearing has spun a little or gets plugged it will cause turbo failure from lack of oil. I thought I would post this since some people have had turbos that go out after 500 miles. Then purchase another one and does the same thing 2,000 miles later.
Just a little fyi.
Just a little fyi.