Newmans2021

We bought our 2021 Sierra this spring and drove it for 5,000 miles without issue. Installed leveling kit (can't remember if it was 1.5" or 2"), new tires and rims and had alignment done within first month - no issues and a few thousand miles later. Within the last couple weeks, around mile 5,500, all the DIC (driver info center) lights have been coming on and we have not seen anything consistent with the frequency of them. We have not noticed any loss of power or braking issues. Took it to the dealer 3 times now and they could not find anything wrong with it and did not see any codes when scanned. They stated because the lights didn't flash for them, there was nothing wrong and sent us home. Finally took video of warnings and dropped it off with codes flashing. They had it in the shop 3 separate times two days and said it is the leveling kit, but will keep the ticket open in case the lights come back on. I realize it is hard to diagnose and pinpoint electrical issues, but I feel like there is so many unknowns about these vehicles when it comes to trouble shooting. If it is the leveling kit, I wondered if something needs to be recalibrated? Anyone else hear of issues like this? Would the leveling kit cause this? I am not seeing a connection here but could be missing something and am hoping someone can share or give an opinion. Thanks in advance and appreciate all advice!! UPDATE 9/2/21: Leveling kit removed and still have codes flashing, at a loss as to what to do next and very disappointed!