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Rattle when accelerating

Rattle when accelerating

Postby 3mkennels [OP] » Dec 29 2011, 7:47pm

I have a 07 Sierra and have been noticing the last few weeks or so that when I'm accelerating theres a rattle under my truck on the pass side. I can't tell if it's front, middle or back. I'm leaning more towards the front. I've checked the heat shields which seemed fine. The underneath of the truck is clean of debris. It only seems to happen when I get in the 25-40 mph range but once let let off the gas the noise stops and only happens in the mph range. It's real annoying. Anyone experience this before? My thoughts are front wheel well plastic, or exhaust but of course when I check nothing seems out of place.

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Re: Rattle when accelerating

Postby lzn197 » Dec 30 2011, 4:12am

One of the things I ran into was the wiring harness that connects to the oxygen sensors was vibrating on the cowl area within the rosebud connector that holds the harness.
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