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  1. #1
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    Z71_usmc_rebel's Avatar
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    Question Steering column knock?

    Hey guys been forever since I have been on here, but would like to get back to being a regular here! Anyways, I seem to have a knock coming from the steering column when the wheel is turned or just idling down the road and running over small bumps? any ideas? I have no clue where to begin to look for the issue? thanks guys hopefully someone can shed some light on this!
    Justin - Beavercreek,OH

    02 Z71 Ext. Cab (fully Loaded)
    * 9" Total Lift (RoughCountry)
    * 35' BF Goodrich Mud Terrain KM2s w/ 16" Chrome Pro Comp wheels
    * Hypertech Maxx Energy Programmer
    * K&N Intake
    * BlackOut Tails


  2. #2
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    stephan's Avatar
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    I did the search function up at the top & found this from another poster. Hope it helps.
    FWIW:

    There is a GM TSB (superseded several times) which addresses this issue. I have access to the latest TSBs (which apply to my '04 Silverado) via my ALLDATADIY.COM subscription, but I hesitate to post the entire thing here. At any rate, here's how it begins:


    Steering - Underhood Clunk Heard/Felt in Steering Wheel

    TECHNICAL
    Bulletin No.: 00-02-35-003N
    Date: March 26 2008

    Subject:
    Clunking Noise Under Hood and Can Be Felt in Steering Wheel and/or Steering Column (Replace Upper Intermediate Steering Shaft [I-Shaft] Assembly)

    Models:
    2002-2006 Cadillac Escalade Models
    1999-2007 Chevrolet Silverado Models (Classic)
    2000-2006 Chevrolet Suburban, Tahoe Models
    2002-2006 Chevrolet Avalanche
    1999-2007 GMC Sierra Models (Classic)
    2000-2006 GMC Yukon, Yukon XL Models
    2003-2006 HUMMER H2

    Attention:
    This Service Bulletin DOES NOT include Mid-Size Utilities such as Buick Rainier, Chevrolet TrailBlazer Models, GMC Envoy Models or Oldsmobile Bravada. Refer to Service Bulletin 02-02-35-006A or newer for Mid-Size Utilities.

    Supercede:
    This bulletin is being revised to add diagnostic information (refer to Diagnostic Tips) to check the lower steering column bearing as a potential source of the noise. Please discard Corporate Bulletin Number 00-02-35-003M (Section 02-Steering).


    The entire TSB, including a step-by-step procedure, requisite precautions and tools, and detailed images, is posted (by a FORMER GM Parts and Service Mngr, named Mike) at the following link... I suggest a SAVE TO DISK complete with ALL IMAGES, once this page loads:
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol


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