I have 2015 Silverado with 47,500. The engine started ticking and there was a loss of power in June of 2022. I took it to the dealer and they said it was a lifter. Cost to repair would be $3500. I complained and told them to check with GM as this is a known issue. GM agreed to pay all but $1400 of the bill. All of the lifters and a broken push rod on the left side were replaced.