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2011 Cab mount nut loose

This is a discussion on 2011 Cab mount nut loose within the Exterior Tech forums, part of the General Discussion category; I was taking the cab mounts out tonight to put my new nerf bars on and twisted the nut in ...

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    2011 Cab mount nut loose


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    I was taking the cab mounts out tonight to put my new nerf bars on and twisted the nut in the middle cab mount. Is there a way to fix it, or get the bolt the rest of the way out? Please, I need help quick

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    2nd Amendment Supporter mudbuddy's Avatar
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    Re: 2011 Cab mount nut loose

    Found this on the GM site tonight.


    2010 Chevrolet Silverado - 4WD | Sierra, Silverado VIN C/K Service Manual | View All Bulletins | Document ID: 2535652
    #10-08-61-001: Information on Body Mount Bolt Stripped or Will Not Loosen - (Oct 5, 2010)

    Subject: Information on Body Mount Bolt Stripped or Will Not Loosen

    Models: 2010-2011 Chevrolet Silverado
    2010-2011 GMC Sierra

    The purpose of this bulletin is to provide guidance to GM dealers when performing repairs that involve the removal of the body mount bolts. Technicians may discover that one of the cab mount bolts won't loosen from the vehicle. The bolt may act like the nut is cross-threaded or no longer secured to the floorpan of the vehicle.

    The cab mounted cage nut may have bent or broken loose allowing the nut to spin. If the nut is allowed to spin, it may prevent the bolt from loosening. The front cab mount nuts are welded to the body structure and are not involved with this bulletin.

    The cage nut assembly must be accessed from inside of the vehicle if this condition occurs. Some of the cage nuts have rectangular access plates in the floor of the passenger compartment. These plates are located above the affected bolt. On extended cab vehicles it is necessary to create access holes in the rear floor area to reach the rear cage nut.
    Creating Access Hole (Extended Cab Vehicles Only)

    Use the following steps to create an access hole in the rear floor area of extended cab vehicles. This procedure only applies to the rear set of mounting bolts.

    Note: This procedure below is for the left side of the vehicle. The procedure and measurements are the same for both the left and right side procedures.

    1. Remove the seat located above the affected bolt. Refer to Rear Seat Replacement in SI.
    2. Partially remove (pull back) the floor covering (carpet) to expose the seat mounting stud area of the floor.

    Object Number: 2531017 Size: SH
    Click here for detailed picture of above image.
    3. Apply masking tape to the repair area as shown.

    Object Number: 2531019 Size: SH
    Click here for detailed picture of above image.
    4. Using a straight edge, create a line along the inboard side of the seat mounting studs as shown.

    Object Number: 2531026 Size: SH
    Click here for detailed picture of above image.
    5. Measure and mark as shown (A), 10 mm (3/8 in).

    Object Number: 2531027 Size: SH
    Click here for detailed picture of above image.
    6. Find the center point between the two mounting studs as shown. Create a second mark as shown.
    7. Use a center punch to create a mark in the sheet metal.

    Object Number: 2531028 Size: SH
    Click here for detailed picture of above image.
    8. Using a 1-1/2 in. hole saw, create an access hole as shown.
    9. Service the cab mounting bolt and nut as required.

    Object Number: 2531029 Size: SH
    Click here for detailed picture of above image.
    10. Coat the perimeter of the access hole with RTV Silicone Sealant, GM P/N 12378521 (in Canada, 88901148) or equivalent, to seal the bare edge of the metal.

    Object Number: 2531030 Size: SH
    Click here for detailed picture of above image.
    11. Install the round body plug, GM P/N 15908858. Ensure that the plug is sealed with the silicone sealant.
    12. Reinstall the floor covering and seat.

    Cage Nut Access Using Rectangular Service Plug

    Rectangular service holes have been provided in the floor of the cab to access the cage nut in all other cab mounting bolt locations. The service hole is directly above the cab mount bolt. Use the following steps to remove and replace the service plugs that cover the service hole.

    1. Remove the seat located above the affected bolt. Refer to SI for the applicable seat removal steps.
    2. Remove the sill trim plate. Refer to Front Side Door Sill Trim Plate Replacement in SI.
    3. Partially remove (pull back) the floor covering (carpet) to expose the rectangular service plug.
    4. Using a gasket scraper or similar tool, pry off and discard the rectangular floor plug.

    Object Number: 2531031 Size: SH
    Click here for detailed picture of above image.
    5. Service the cab mounting bolt and nut as required.

    Object Number: 2531033 Size: SH
    Click here for detailed picture of above image.
    6. Coat the perimeter of the access hole with RTV Silicone Sealant, GM P/N 12378521 (in Canada, 88901148) or equivalent, to seal the bare edge of the metal.

    Object Number: 2531035 Size: SH
    Click here for detailed picture of above image.
    7. Install the rectangular body plug, GM P/N 15040085. Ensure that the plug is sealed with the silicone sealant.
    8. Reinstall the floor covering, sill trim and seat.

    Parts Information

    Part Number


    Description


    Qty

    15040085


    Plug, Floor Panel Drain Hole (Rectangular Style Plug)


    As Req.

    15908858


    Plug, Floor Panel Drain Hole (Round Style Plug)


    As Req.

    12378521 (in Canada, 88901148)


    RTV Silicone Sealant

 

 

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