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Reply To: 2020 Denali HD Diesel – DEF Tank/Wiring Failures…?

February 20, 2022 at 11:21 am #693116
BarrieFrank
Participant

Hi. My 2020 just developed the same issue a week ago. Took it in for servicing, dealer replaced one of the parts they had in stock and the warnings all disappeared shortly after that (but not right away, I actually drove it for about 50km and made 2 stops before the warnings stopped). Then, 2 days ago, the same warnings came up. Do you know if it will actually go into limp mode like it’s warning? I’m told it could take months to get replacement parts. I can’t believe that I might have to park an almost $100k vehicle for an indefinite length of time because of this.

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