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Feb 11, 2026 - 01:03 PM
We’ve provided several answers to questions related to Sinister Diesel Coolant Reservoir (Degas) for 2013-2015 GM Duramax 6.6L LML , see some other helpful Q&A related to this product.
Question: Will this fit a 2011 HD3500 LML
Answer: It will not fit the 2011 LML. This Sinister Diesel Coolant Reservoir (Degas) is specifically designed for the 2013-2015 GM Duramax 6.6L LML. It is not compatible with earlier model years, such as the 2011 LML.
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