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How to deal with a failing DEF system? on 2011 Chevrolet Silverado 2500 HD

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
I read a lot complaints about DEF poor quality problems on many forums and same thing happened recently to my truck after 24k miles. There is any permanent fix to this frequently failing system since even repaired, is failing again?
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