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  1. #1

    Default Rattling noise underneath - exhaust?

    New Member. 2005 / 2500 HD 4WD/ Ext Cab / Auto Trans. 126K miles. Mostly highway use. Rattling noise underneath, towards front.

    First time to dealer - they said the right front wheel assembly was bad, so they changed it out - $ 620! Think I got took on that one! Exactly one week later, exact same noise, again. Back to dealer. Said they couldn't hear it - everything checked out okay. After 4 test drives (last one w/me) - they finally said at first they thought it was catalytic converter, then a loose baffle in muffler. Sporadic - though it seems to get louder the longer I drive. Truck runs great - no overheating, no rear end or tranny noise. Clueless at this point.???

  2. #2

    Default

    Quote Originally Posted by verne View Post
    New Member. 2005 / 2500 HD 4WD/ Ext Cab / Auto Trans. 126K miles. Mostly highway use. Rattling noise underneath, towards front.

    First time to dealer - they said the right front wheel assembly was bad, so they changed it out - $ 620! Think I got took on that one! Exactly one week later, exact same noise, again. Back to dealer. Said they couldn't hear it - everything checked out okay. After 4 test drives (last one w/me) - they finally said at first they thought it was catalytic converter, then a loose baffle in muffler. Sporadic - though it seems to get louder the longer I drive. Truck runs great - no overheating, no rear end or tranny noise. Clueless at this point.???
    I have a 2007 GMC Sierra 1500 and it started in with a sort buzzing/rattling noise. I thought it was the shield on the exhaust system but it turned out to be the baffles in the muffler broke lose ( and this was at only ~30,000 miles).

    2007 GMC Sierra 1500 Ext. Cab
    4.8l
    Edge Evolution Programmer
    GM Performance Cold Air Intake
    GM Performance Exhaust
    Bighorn Mud Tires
    Bed Rug Bed Liner
    Halo Spark Plugs

  3. #3
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    Eddie Z71's Avatar
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    Default

    Hi, and welcome to the site!
    Eddie , 2000 Chevy Tahoe Z71 (old style)

  4. #4
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    murdog94's Avatar
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    Cloquet, Minnesota, United States
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    Welcome aboard....
    Mike

    Currently

    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

  5. #5

    Default

    Yes, welcome...

    I just replaced one of my mufflers, on the year old dual exhaust.

    The inner baffle cames loose and sounded like a lot of loose change rolling around in a clothes dryer.

    Cheap overseas parts...
    Pavement sucks... :grrrrrr:



    1994 K1500 4x4 Ext. Cab
    PCM chip and Xenon 8000k bulbs
    350cu.in bored over .050"
    balanced Crank, 10:1 compression
    Flat top pistons,cam,ported heads
    Option Racing Cold Air Intake
    Holley Throttle Body Spacer
    Accell Igition, 45kv coil
    FloTech Headers, no CATs, dual exhuast
    Goodyear Silent Armor A/T 305/70-16
    Pioneer SupertunerIII CD USB Bluetooth
    Kicker ZX200.2 ZX Amp
    Kicker Audio COMP 10" Subwoofer

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