I've had a few messed up/cross threaded lugs on some of the newer Camaros I've had. I had to cut one front lug off as it was cross threaded so bad someone messed up the lug key as well. It was most likely a messed up lug that went on crossthreaded and didn't put up much resistance so it torqued down like normal.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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