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Tod Geddes

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  1. Have a 2005 GMC Sierra with 5.3L engine and about 130K on it. Have been getting a rattle when accelerating or under load. Check the OBD II but no errors showing. Have run fuel cleaners and such, not much better. Oil and filter changes did nothing and neither did different grades of gas. Had the anti-knock sensors replaced back in 2020 after OBD error, along with spark plugs and wires Any suggestions?
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