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Originally Posted by Camaro6chigan
Hey Victor_SS... How did you make out? Had the same issue a few days ago. Hopefully nothing serious?
I was moving my car from the garage to the driveway and once I started it up: Service Stabilitrak and Engine light. Took it to the dealership and it posted the following: P0300 U0401. It was running rough the day before service but stopped the day I took it in. The dealership could not determine the Root Cause? So I'm left guessing and hoping that's it's nothing serious. Trying to convince myself it's nothing serious. I only have 400 miles on my 2016 2SS.
I did not drive the car for a week prior to this happening. Only moving it in and out of the garage 4 or 5 times because we're having new drywall put up... The last time I drove it was a Sunday drive with my wife for only about 20 miles... nothing major. Sometimes not knowing can be worst than knowing. Hoping for a root cause...
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Hey, sorry for the late reply. I little update, since taking the car to the dealer they told me it was a broken valve spring on cylinder 8 and 3. It was covered under the warranty, unfortunately they said all my spark plugs were soiled and needed replacement. Along with a fuel system cleaning, which was not covered under the warranty. I gave them the go ahead and about a week later they said that the valve springs were fixed, but they were still getting a cylinder leak on #8. The need to contact the warranty company to see what they would like to do. About a week went by without a call back so I called them. They told me they need an inspector to go and see the car. Today, they inspected the car and they were told they need to remove the heads for further diagnosis, which they needed my approval for. The service manager told me they charge $2,000 for that service, but should be covered inder the warranty unless they see signs of abuse. So thats where I stand as of today. Waiting on another call back.