Rufasim

The only time I open the rear window is when the rear passengers open their windows. It eliminates the buffeting.

Why would someone want to do this mod? I am not trying to sound flippant, I just don't understand why this is a want when GM has one that will fit perfectly

Are you sure you picked up the right truck? I hope this was don at he dealer so they can fix the issues they made

I have one on a 2018 silverado ltz. Only been on a day or 2 but no codes yet. Figure they should pop up as soon as the unit is plugged in

Crickets. I think that is your answer. I just got the one that keeps all 8 on all the time

If not lifters and valves could it be pinging, only happens under load? If so, higher octane should help

I going to take a guess and say that no one in this thread has ever owned a Harley. You want to talk about making strange noises? Drove me nuts. To lessen the amount of noise that they would make is to 1. use a higher octane fuel. Harley owners call it pinging. It is actually detenation. Not sure what causes it, think it has something to do with unburnt fuel. the higher octane helps a lot. 2. Use conventional oil. If I put synthetic oil in my old Street Glide the ticking was something unbearable. Just as soon as I changed over to conventional, the ticking subsided. Never went away but the engine is a bit closer to you on a bike compared to a truck. If the higher octane fuel is the fix, really nothing you can do about it that I know of. Just keep buying the more expensive gas.