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Reply To: Fuel injectors: 2022 GMC Denali Limited 6.2 L V-8

#754284
CLang15
Participant

For newcomers to this issue – I did not get a check engine light until around 5500 km (3,400 mi) on the truck. It was shuddering and misfiring from day one but the shop couldn’t figure out what was wrong until I got the check engine light. I knew there had to be something wrong though. They kept misdiagnosing it as wheel balancing issues, drivetrain balancing issues, torque converter etc… Finally when the check engine light came on after a huge shuddering attack while driving (OBD II code was P0622 which I believe is Injector 8 fail to close in time), they were able to determine that it was the injector. I was told that 2 had to be replaced along with some piping and gaskets and such. All parts took 64 days to get in Kingston, Ontario Canada. Best of luck to everyone.

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