Man, I'm onto my third opinion now. First opinion stated there were already some shavings in my oil and that I needed a motor. I saw the light flakes with my own eyes, 2nd and third opinion said they saw the shavings but it was normal wear for an engine with those miles. All three had the same diagnosis as to the crankshaft being the cause of wearing rear mains and one of the mechanics. The main one I use told me to just buy a motor he would put it in would be equal to or equivalent probably with the costs im already gonna be in. Trust me this is my main focus, I drive a truck during the day 300-500 miles a day usually so if the Tahoe breaks down and I'm 150 miles away we are in trouble lol.