Guys.. I know this is an old thread. For a year I'm knocking around a fantastic 5.3 rebuild or a 6.2 Swap. I have a 2012 Yukon XL with the LC9. It's super clean, lifted, and I'll drive it toll it's dead.
I have 251613 miles on it. Just replaced the 6L80 trans about 5000 miles ago.
After...
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