So my car started having issues at around 20k miles. Developed a delayed start. Sound like it’s struggling to start up. But it does start up ever time. Took it to dealer they told me they could not find the issue with the car. And that GM told them that the engine is working perfectly fine. Car sounds like an old Diesel engine trying to start up. It’s still under warranty, the dealer also stated that all ss will develop the same issue but I thinks that’s bullshit.