18NA370

File in Section:
Bulletin No.:
Service Bulletin
Date:
18-NA-370
January, 2019
TECHNICAL
Subject:
Pickup Box Ornamentation Bar (Sports Bar) Wind Noise or Rattle
Brand:
Model:
Chevrolet
Model Year:
VIN:
from
to
Silverado
1500
2014
2014
GMC
Sierra 1500
2014
2014
Chevrolet
Colorado
(VIN S /
VIN T)
Silverado
2015
2018
GMC
Canyon
Sierra
2015
2018
from
Engine:
Transmission:
All
All
to
Involved Region or Country
North America, N.A. Export Regions
Additional Options (RPOs)
Equipped with ACCESSORY-SPORT BAR - BED MOUNTED - DESIGN 1 (SBY)
Condition
5191674
Customer may comment on hearing a wind noise or rattle at the tubular roll bar area of
the Sports Bar (1).
Cause
Correction
Copyright 2019 General Motors LLC. All Rights Reserved.
The cause of the condition may be a lack of support between the top plate fasteners,
which may allow the plate to come in contact with the tubular roll bars.
Note: Applying tape between the round roll bars and the top plate will prevent the
contact noise.
Order the appropriate tape kit from the Parts table below, and apply the tape to both
tubular roll bars following the steps in the Service Procedure below.
Page 2
January, 2019
Bulletin No.: 18-NA-370
Service Procedure
5191685
5191678
1. Remove the 8 bolts retaining the top plate to the
Sports Bar, and remove the plate.
Note: Pressure applied using a roller will generate the
most accurate dispersion of pressure, for proper
wet-out of the tape.
4. As shown above, apply the tape between the
fastener hole locations.
5191682
2. Noted in the graphic above, clean the areas
between the bolt holes. Remove any dirt and
debris, and finish cleaning with an alcohol wipe to
assure adhesion of the tape.
Note: The 6 pieces of tape from the attachment kit are
all the same thickness and width, however regardless
of vehicle, the tape pieces will need to be cut to the
proper length.
3. Cut the 6 pieces of tape to the appropriate length
dimension specified below:
• For full size trucks, the tape length needs to
be trimmed to 330 mm (13 in).
• For mid size trucks, the tape length needs to
be trimmed to 250 mm (9.85 in).
5191687
Important: Note that the large holes in the top plate
are available for additional mounted accessories. As
shown in the graphic above, they need to be oriented
over the rearward tubing.
5. Reposition the top plate and install the 8 bolts.
Tighten
Tighten the bolts to 20 Y(14.75 lb ft).
6. Verify the noise has been eliminated.
Bulletin No.: 18-NA-370
January, 2019
Page 3
Parts Information
Causal
Part
N/A
Description
Part
Number
Qty
ATTACHMENT
PKG-VEH
ORNAMENTATION BAR (Full
Size Truck)
84564415
1
ATTACHMENT
PKG-VEH
ORNAMENTATION BAR (Mid
Size Truck)
84564857
1
Warranty Information
For vehicles repaired under the Bumper-to-Bumper
coverage (Canada Base Warranty coverage), use the
following labor operation. Reference the Applicable
Warranties section of Investigate Vehicle History (IVH)
for coverage information
Labor Operation
Description
Labor Time
0580388*
Install Noise Reduction Tape to Sports Bar
0.4 hr
*This is a unique Labor Operation for Bulletin use only.
Version
1
Modified
Released January 04, 2019
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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