A couple weeks ago my daughter told me my truck (2020 LM2, 7k miles) was "dripping" going down the driveway. I figured she was talking AC condensation but got out and looked anyway. There was a trail of oil going down the street, the entire underside of the truck was coated and a puddle quickly formed underneath. I knew it was clean that morning as I washed it. No CEL yet but with no oil registering on the dipstick I threw a pan under it and called the dealer to pick it up. Got a call at the end of the day it was the rear main seal. Took about a week as the timing cover was on back order but the dealership was great to work with. Just glad it didn't happen a day earlier as we were away home home on vacation.