EK0981

Same issue with my 2021 GMC Yukon, purchased it in Nov. 2020 and has less than 10K miles. Code registers misfire in cylinder six but dealer never could replicate the issue. Dealer switched spark plugs between 2 and 6 and I took it home. Within 15 minutes of leaving, I stopped at a light and the rough idle started up again. Took it back to the dealer and had another misfire in cylinder 6. They replaced the injector only to have another misfire register the next day. Last I heard, they are waiting for authorization from GM to remove and inspect the lifters. I've also opened a case with GM 3 days ago and have yet to hear from them. Was told by the dealer about the defective hydraulic lifters that exist on certain vehicles and if that is my issue then all 8 will need to be replaced. Made it seem like it would take months to get those parts. I've already been without the vehicle for 11 days. Hoping for another update today!