Poor performance, excessive smoking and rough idle can be a symptom of an inoperative or failing fuel pressure relief valve. Avoid high GM prices, and purchase this direct OE Bosch replacement from DHD.
Fitment: 2011-2016 LML Duramax 6.6L
Note: This is not the LML System Saver. Please See Exergy E05 10505.
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California Residents: Prop 65 Warning
WARNING: Cancer and Reproductive Harm