| funny sound?
If I am on the interstae and kick my duramax up to around 85 or so and then let off the pedal I get a funny knocking noise. It doesnt last long and sounds like a gas engine knocking. Any ideas would be greatly appreciated. Thanks
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White 05 Duramax 4x4 crew K&N air intake, No kitty, Predator, 4" MBPR 409 exhaust, White gauge cluster, billet grill. Westin all the way around. |