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Jim14

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  1. Jim14
    New here to the forum. I had the same problem as above. I have a 2016 Sierra 2500HD Denali Diesel and the DEF heater went around 36,000 miles. Dealer replaced it and two days later the engine light came on again and they had to replace the one they just installed. I'm up to almost 40,000 miles and no issues.......yet.
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