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  1. #1

    Default 2011 Silverado - Tacky frame coating?

    I was under my 2011 Silverado crew cab installing my side steps, and noticed that when my sweaty arm touched the frame, my arm was turning black. I touched the frame, and it has a black soft coating that can be rubbed off fairly easily to expose bare metal. Is this stuff suppose to eventually harden? It seems to be holding up just fine, as long as nothing comes in contact with it. Any help would be appreciated! Thanks

  2. #2
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    Yes it takes some time for it to cure & harden (it's undercoating that you're seeing) Cure time depends a lot on temp & humidity.
    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


  3. #3

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    I would recommend that you contact your local dealer regarding your concern. They are the best resource in terms of finding how long this would take to harden when taking your environment into account. Please keep me posted. Thank you.

    Tricia, GM Customer Service.

  4. #4

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    Quote Originally Posted by GM Customer Service View Post
    I would recommend that you contact your local dealer regarding your concern. They are the best resource in terms of finding how long this would take to harden when taking your environment into account. Please keep me posted. Thank you.

    Tricia, GM Customer Service.
    Will do Tricia, Thank you both for your replies.

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