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NHTSA ID Number: 10187378
Manufacturer Communication Number: 18NA056
Summary
This service bulletin provides a procedure to apply aluminum butyl tape around the lower side object modules and the fascia to aid in deflecting the radar away from the ground and stop triggering false alerts.
4 Affected Products
Vehicle
MAKE | MODEL | YEAR |
BUICK | ENCORE | 2017-2020 |
Parts
Description | Part Number | Qty |
DEADENER, RF PNL FRT (200X305) | 22709067 | 1 |
|
SEOCONTENT-START
Copyright 2020 General Motors LLC. All Rights Reserved.
Service Bulletin Bulletin No.: 18-NA-056
Date: December, 2020
TECHNICAL
Subject: Side Object Sensing Alert Module Not Working Correctly and/or Incorrect Side Mirror
Notification
This bulletin replaces PIC6324. Please discard PIC6324.
Brand: Model:
Model Year: VIN:
Engine: Transmission:
from to from to
Buick Encore 2017 2020 — — All All
Involved Region or Country North America
Additional Options (RPOs) Equipped with SIDE ACTIVE SAFETY-OBSTACLE DETECTION (RPO UFT)
Condition Some customers may comment that when driving, the side mirror indicates there is a
vehicle present when there is not.
Cause
4974639
Page 2 December, 2020 Bulletin No.: 18-NA-056
Note: Most radar reflections may be found worse on the driver side than the
passenger side.
This condition may be caused by unwanted radar reflection being detected and triggering
the false alerts.
Correction If the side blind zone has been found not working properly, apply a piece of aluminum
butyl tape to the bottom of the side object sensing alert module.
Service Procedure
1. Raise the vehicle. Refer to Lifting and Jacking the
Vehicle in SI.
3608376
2. Remove the affected side rear wheelhouse liner
(3). Refer to Rear Wheelhouse Liner Replacement
in SI.
3. Separate the wiring harness from the anchor point
under the module.
Note: The lower area must be completely covered,
including the wire harness anchor point, to avoid
unwanted radar reflections to be detected.
4. Using Acrysol or equivalent, clean the bottom of
the module and fascia.
5. Using care, cut a 3½ inch wide section of
butyl tape.
Bulletin No.: 18-NA-056 December, 2020 Page 3
4997546
6. Using care, cut a relief for the reflector mount in the
middle of the tape.
7. Pre-install the butyl tape and check for alignment
to the reflector mount.
4998143
8. Align the pre-cut relief with the reflector mount (2).
9. Peel the backing off the aluminum butyl tape and
apply to the bottom of the module (1) and fascia
making sure the area is completely covered as
shown in the graphic above.
10. Install the wiring harness into the anchor point (3).
11. Install the affected side wheelhouse liner.
12. Lower the vehicle.
• If the side blind zone and/or side mirror
indicators are performing properly, no further
action is required.
Page 4 December, 2020 Bulletin No.: 18-NA-056
• If the side blind zone and/or side mirror
indicators are not performing properly, refer to
SI for further diagnostics.
Parts Information
Causal
Part
Description Part
Number
Qty
N/A DEADENER,
RF PNL FRT
(200 X 305)
22709067** 1
**There is enough material to do additional vehicles. Store
the remaining material for future use.
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
6480458* Apply Butyl Tape to Side
Object Sensing Module
0.6 hr
*This is a unique Labor Operation for bulletin use only.
Version 5
Modified
Released March 16, 2018
April 17, 2018 – Updated the Model Year to 2017.
June 13, 2019 – Updated the Model Year to 2019.
September 01, 2020 – Updated the Model Year to 2020.
December 14, 2020 – Removed verbiage specific to one side of vehicle.
Additional SI Keywords: side object, detection, side
blind zone
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.
WE SUPPORT VOLUNTARY
TECHNICIAN
CERTIFICATION
SEOCONTENT-END
NHTSA ID Number: 10137581
Manufacturer Communication Number: 18NA056
Summary
These technical bulletin provides a procedure to apply aluminum butyl tap around the lower side object models and the fascia to add in deflecting the radar away from the ground and stop triggering false alerts.
1 Associated Document
Manufacturer Communications
Bulletin No.: 18-NA-056
Date: April, 2018
https://www.nhtsa.gov/recalls?nhtsaId=10137581
MC-10137581-9999.pdf 1420.663KB
NHTSA ID Number: 10163223
Manufacturer Communication Number: 18NA056
Summary
These technical bulletin provides a procedure to apply aluminum butyl tap around the lower side object models and the fascia to add in deflecting the radar away from the ground and stop triggering false alerts.
1 Associated Document
Manufacturer Communications
Bulletin No.: 18-NA-056
Date: June, 2019
https://www.nhtsa.gov/recalls?nhtsaId=10163223
MC-10163223-9999.pdf 1260.37KB
1 Associated Document
Manufacturer Communications
Bulletin No.: 18-NA-056
Date: December, 2020
https://www.nhtsa.gov/recalls?nhtsaId=10187378
MC-10187378-9999.pdf 544.355KB
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