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  1. #1

    Default 2010 GMC 3500 crew cab Dooley-creaking noise in cab

    I've been expereincing a lot of "creaking" noise in the cab of my truck and in concern, I took it to the dealership to have it checked. Their answer for the noise was, as they called it, the "Flex Body" and there isn't anything they can do about it. Describing it as normal and its due to the cold temperatures. Granted, the only time the creaking occurs is when going over speed bumbs or uneven terrain at slower speeds.

    Anyone believe this? I've never heard of such a thing. I've googled "Flex Body" and it sure doesn't relate to a truck. (grin) Also, is anyone else expereincing the same noise?

    I'm about to fire off some complaints but I'd like to be sure first. Thanks in advance for any help!

  2. #2


    Ive had my '11 x-cab for 3 months now and I get some squeaking sounds from the passenger side dash near the windshield when on rough roads and such but it only does it when it's cold.
    I think the odd choice of wording "flex body" refers to the contraction and expansion of matrials in the vehicle thats caused by changing temperatures but I'm no expert, just my opinion.

    '11 Chevy Silverado 1500 X-cab Z71
    Vortec 5.3L V8 4x4
    K&N Cold Air Intake
    Chrome Grille/Mirror covers
    Custom painted Emblems
    Tinted windows 30% F - 5% B/sides

    Further upgrades to come...

  3. #3


    I would get under the truck myself with some wrenchs and sockets and tighten all the body and bed mounts alone with ever bolt or nut. Years ago I had a new Blazer that creaked and it was loose body mounts from the factory.

  4. #4


    Checking the cab bolts, etc. is on my to-do list. It just ticks me that the dealership wouldn't even do that. I've even noticed the noise this past summer, just not as loud. Thanks for the info.

  5. #5


    Thats why I would rather just fix it myself rather than putting up the the dealers bullsh*t.

  6. #6


    You didn't happen to have any step bars installed recently, did you?

    2008 Silverado 1500 LT 5.3L Crew Cab
    Desert Brown Metallic

    Century top, Yakima roof rack, 2.5" front lift, Readylift 3" rear blocks, Line-x bedliner, step bars, AVS vent visors, Weathertech floor liners, door sill guards, power tailgate lock, tailgate damper, KC light bar w/ PIAA 525s, rear mini-light bar, rear LED reverse/utility lights, dual batteries (Cole Hersee isolator), DIC upgrade, 20" GM wheels, Cooper Discoverer A/T3s, 26 gal. onboard air (twin Viair 480Cs), Nathan Airchime K3HA / Old cast 2nd Gen. P3 Horns, Graham White valve, bell

    Past Chevys: 1985 S-10, 1963 BelAir sedan

  7. #7


    I get the creaking when going over speed bumps turning into driveways.....its the normal flex you get from the cab and truck bed.

    I never hear it unless I have the radio turned off however!

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