JohnnyLewis1

I have a 2022 Silverado 3500HD 6.6L Duramax and this message came up while driving down the highway at about 40MPH... most recent service was a buick gmc dealer and they topped off my DEF fluid and changed my oil and rotated the tires i have done nothing since and this came up.. my nearest dealer is 3 weeks out for service i was hoping there's something i can do or try until then as i need my truck to commute to and from work and have no other vehicle... any help or advice would be amazing thank you!