2009 Tahoe..Mystery noise

pcwizard2600 said:

Hello all,
I have an '09 Tahoe LTZ with 196K on it, but it is in very good condition both mechanically and rust wise. I have an intermittent heavy clunk or thump noise coming from the front of the vehicle. It is intermittent, it may go for days without occurring, then once in a while I'll get a day where it does it a lot. When it occurs, it is a single clunk, not specifically associated with a particular action. It may happen turning into the driveway, or it may occur driving down the road. I've had it looked at by two different shops (one of them twice) and nothing can be found. Of course, when I take it in, they can't duplicate it. They've gone over the steering, suspension, drivetrain, frame, various mounts and find nothing wrong. When it occurs it is heavy and loud sounding, definitely different from the usual road/bump noises. Anybody ever experience anything like this ??

Thanks,
Pat

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pcwizard2600 said:

Update: Well it appears the issue was a sway bar link. My left one broke, and so far there has been no noise. Makes sense, as when it is up on the lift, the suspension drops so it tightens up things like that. Nothing was obviously visible. Anyhow, no noise since replacement

Thanks for the previous replies everyone

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pcwizard2600 said:

Update: Well it appears the issue was a sway bar link. My left one broke, and so far there has been no noise. Makes sense, as when it is up on the lift, the suspension drops so it tightens up things like that. Nothing was obviously visible. Anyhow, no noise since replacement

Thanks for the previous replies everyone

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John177 said:

I am having the same issue. Bought a 2014 Tahoe PPV about three weeks ago. It has been driving great (minus some electrical issues with the police strobe lighting) up until today. I was pulling out of my work parking lot (slow right turn) and heard a loud bang from the front end followed by a few more loud bangs as I pulled over to inspect the undercarriage. Sway bar mounts & links, struts, tie rods, control arms all looked good (looks like the struts and tie rods are new). Turned back out to a few more bangs and drove for a few miles listening before I got on the highway, drove home 25 miles down the interstate with no sounds.

I searched and found this post, checked the sway bar links with the wheels on the ground and they seem to be fine. I haven't checked with the wheels off of the ground yet, but I'm not sure what the last post from doubeleive meant. If the front wheels are off of the ground it releases the pressure on the sway bar, correct? Does anyone have any other ideas? Thanks for the help!

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