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  1. #1

    Default Exhaust rattling noise?

    I put a gibson dual exhaust on a couple months back and now when i start it up some times this awful rattling noise is so loud. Even when i first press the gas this noise comes and it finally goes away when my truck gets warmed up. I did a little research and some guys say its the heat shield on the cat but its a 2011 so crap like that shouldnt be goin on. I tightened down all the hooks and clamps on the gibson exhaust and even had it spot welded for security but i still hear this noise and its startin to piss me off cause people look when it rattles. Do any of yall have any ideas or diagnosis? im gettin ready to rip it off and just go without it.
    thanks guys
    michael

    2011 Silverado (Ellie)
    Extended cab

    Upgrades:
    K&N Cold Air Intake
    Gibson Extreme Dual Exhaust
    Leveling Kit
    Warn Bull Guard
    Blackedout Bowties
    BF Goodrich All Terrains

  2. #2

    Default

    Only thing i could think of is if there is some type of baffe in the muffler.I used to have a truck that did the same and it was a baffel that turned loose in the muffler.Hope this helps.
    2000 Chevy Silverado 4WD Classic
    2'' lift Torsion Keys and air shocks
    33/12.50 Hankook Dynapro M/T
    3 1/2'' down pipe back 6" Tip
    Dodge Towing Mirrors
    Smoked Tails, Cab Lights, and Side Marker Lights
    1% Rear and Side Window, 20% Front Tint
    American Racing Wheels/ With a custom black paint
    Cold Air Intake
    Edge Performance Chip
    Custom Audio System
    LED Tails
    Black background headlights and parking lights

  3. #3
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    Default

    Is the exhaust all stainless steel, because my boyfriend has one from Magnaflow that rattles only at idle but once the truck is heated up it's fine. He ended up having the exhaust fully welded, because the clamps will only tighten so tight on stainless pipe.

  4. #4
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    Default

    Try taking a rubber mallet under the truck and bang on the pipe in a couple different places to see if you can pinpoint where its coming from. My exhaust had a rattle and it ended up being that goofy band clamp they started using in 2009 at the front was sitting a little crooked and letting the exhaust rattle, found it after hitting the exhaust under the truck and hearing the same noise.

  5. #5

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    Last time a bought a catback it was the heat shield, sounded almost like an empty tin can for an exhaust.


    2003 GMC Sierra 1500 SLE 5.3
    Factory Tint
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    Low Profile Toolbox
    Westin Nerf Steps

  6. #6

    Default

    ya it sounds exactly like running a stick on fence posts as your walking when it decides to rattle. im goin to get under there tomorrow and hit it with with some thin to see if its a clamp or a chamber is messed up in the muffler. and yes its stainless
    thanks guys

  7. #7
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    Anyone who has ever had stainless steel knows that other than welding it, there is really no way to keep the clamps tight and rattle free. It's the nature of the beast, just wait till it gets real cold out and then you'll hear all kind of noise.

  8. #8

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    Quote Originally Posted by BigMike2011 View Post
    ya it sounds exactly like running a stick on fence posts as your walking when it decides to rattle. im goin to get under there tomorrow and hit it with with some thin to see if its a clamp or a chamber is messed up in the muffler. and yes its stainless
    thanks guys
    Sticks run along fence posts...like tick tick tick tick?

    Exhaust leak.


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