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  1. Bill A

    LBZ: Plastic Dust Cover on Fuel System Test Port

    Hi there, I am a new forum member an Duramax owner, have a 2006 LBZ. When I bought the truck, found that there is a missing black plastic dust cover missing from a brass fitting near the air intake manifold. Here is a picture from a post on the web that I found. Does anyone know the part...