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  1. General Discussion
    Hello Everyone, I have a 2020 Sierra 2500 Duramax Denali, 27,000 miles. The DIC is showing the following two messages, (Service Emission's System, 175 mi Until 65 MPH Max Speed). The dealer picked it up and gave me a loaner vehicle. They called and said the DEF tank needs to be replaced...
  2. 911 Problems Forum
    So I returned my deleted truck to stock and it’s now popping these Two codes. It has 140k on it. There is definitely DEF being injected after the cat I can smell it - there isn’t a diesel exhaust smell. I need to fix this in order to get an inspection sticker. The truck is also driving sluggish...
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