They probably had it fixed by than( good for you!). The rock chip guard did not require anything to hit it to get it. It literally would fall off by washing the truck, in my experience anyway. GM has a fix for that though.From what I've seen on this forum regarding the rock chip guard issues, yes that would definitely concern me more. Luckily I have no sign of that. I wonder if its due to a later build date (8/22) where they had fixed the problem by then, or perhaps my high-clearance side steps keeping flying debris from jump starting the process.