2020 chevy trail boss

Thunderbolt wrote:


My coworkers 2021 5.3 just came back from the dealer with the same issue and had all the lifters replaced. His dash lights all lit up like a Christmas tree as well.

They only did 1 bank, complete. 2 collapsed lifters on the same bank.
Read a TSB dunno if it's the most recent one, that trucks under 8000 miles get ALL lifters replaced if even 1 collapses. Over 8k miles and just the affected bank is replaced.
I would have preferred all of them replaced, presuming the updated ones aren't defective.