10-08-61-001C

File in Section:
Service Bulletin
Bulletin No.:
Date:
08 - Body and Accessories
10-08-61-001C
March, 2013
INFORMATION
Subject:
Information on Body Mount Bolt Stripped or Will Not Loosen
Models:
2010-2013 Chevrolet Silverado
2010-2013 GMC Sierra
This bulletin is being revised to update the Parts Information section. Please discard
Corporate Bulletin Number 10-08-61-001B (Section 08 – Body and Accessories).
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.
Copyright 2013 General Motors LLC. All Rights Reserved.
2531017
3. Apply masking tape to the repair area as shown.
Page 2
March, 2013
2531019
4. Using a straight edge, create a line along the
inboard side of the seat mounting studs as shown.
Bulletin No.: 10-08-61-001C
2531027
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.
2531026
5. Measure and mark as shown (A), 10 mm (3/8 in).
2531028
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.
Bulletin No.: 10-08-61-001C
March, 2013
Page 3
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.
2531029
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.
2531031
5. Service the cab mounting bolt and nut as required.
2531030
11. Install the round body plug, GM P/N 25996758.
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.
2531033
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.
Page 4
March, 2013
Bulletin No.: 10-08-61-001C
Parts Information
Part Number
Description
Qty
15040085
Plug, Floor Panel Drain Hole
(Rectangular Style Plug)
As
Req.
15742557
Plug, Floor Panel Drain Hole
(Rectangular Style Plug)
As
Req.
25996758
Plug, Floor Panel Drain Hole
(Round Style Plug)
As
Req.
12378521 (in
Canada,
88901148)
RTV Silicone Sealant
As
Req
Warranty Information
2531035
7. Install the rectangular body plug, GM P/
N 15040085 or 15742557. Ensure that the plug is
sealed with the silicone sealant.
8. Reinstall the floor covering, sill trim and seat.
In most cases, this bulletin information will be used
when replacing a body mount and should be claimed
under labor code E1095 Drivetrain and Front
Suspension Frame Insulator Replacement. If this repair
is performed while repairing something different, use
the labor code associated with that repair.
• Incremental time for this repair should be claimed
using Other Labor Hours (OLH).
• The recommended OLH for this repair is 0.3-0.5 hr
per bolt.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a
job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your
vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
information.
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