17NA214

File in Section:
Bulletin No.:
Service Bulletin
Date:
17-NA-214
November, 2017
TECHNICAL
Subject:
OnStar, XM, GPS or Antenna Malfunction – May Set DTC B2462, B2470 or B125C - and/
or Water Leak on Headliner at Sun Visor or Overhead Console Areas, Possible Battery
Drain Concern
Brand:
Model:
Cadillac
Model Year:
VIN:
from
to
Escalade
Models
2015
2018
Chevrolet
Silverado
Suburban
Tahoe
Models
2015
2018
GMC
Sierra
Yukon
Models
2015
2018
from
Engine:
Transmission:
All
All
to
Involved Region or Country
North America and N.A. Export Regions
Additional Options (RPOs)
Equipped with High Frequency Painted Antenna Assembly
Condition
Some customers may comment on seeing a visible water leak on the headliner, near the
driver’s sun visor, and/or near the overhead console, or signs of water intrusion from the
antenna base.
The customer may also comment on one or several of the following conditions:
• RED OnStar LED.
• Unable to connect to OnStar.
• OnStar unable to locate the vehicle.
• OnStar has inaccurate GPS location.
• No GPS on the Navigation display.
• Inaccurate GPS location on the Navigation display.
• XM radio No signal or poor reception.
• Water leak from antenna base migrating down inside A-pillar trim, possibly with weak
or dead battery concerns.
Upon inspection, the technician may also find DTC B2462, B2470 and/or B125C set or
stored in History.
Note: A water leak from the antenna into the vehicle could follow different paths, such as
wiring, sheet metal, trim, etc.
Cause
Correction
Copyright 2017 General Motors LLC. All Rights Reserved.
The cause of the condition may be water migrating into the antenna and ultimately
traveling down the wiring pigtail, or by water leaking underneath the antenna base into
the vehicle.
Note: If a water leak is found from the antenna base which has migrated down the
A-pillar trim and if the vehicle has experienced issues of weak or dead battery, inspect the
LH I/P BEC for possible corrosion concerns from water entry.
If the antenna performance concerns outlined and/or one of the water leak concerns are
encountered, replace the antenna with the latest P/N available from CCA parts, following
the Additional Steps outlined below.
Page 2
November, 2017
Bulletin No.: 17-NA-214
Service Procedure
Important: Summarized below are key notes and
additional steps to follow for installing a New High
Frequency Antenna, when addressing the concerns
outlined above.
4828701
2. Using Kent Automotive Acrysol, or equivalent
solvent, clean the roof surface around the antenna
mounting pass-thru opening.
4828697
4828703
4828698
1. Remove the high frequency antenna. Refer to High
Frequency Antenna Replacement in SI.
3. Using Kent Automotive Acrysol, or equivalent
solvent, clean the underside of the New
replacement antenna, around the roof opening
water seal.
4. Add a bead of Kent® High-Tech Seam Sealer
Bulletin No.: 17-NA-214
November, 2017
Clear P/N 10200, or equivalent, to the underside of
the New replacement antenna, around the roof
opening water seal, following the steps below:
Page 3
4.3. The sealer should be allowed to set-up only
briefly - antenna installation should be done
within five minutes of the sealer application.
4828704
4.1. Locate the roof opening water seal (1) at the
center of the antenna.
4828697
5. Install the high frequency antenna to the vehicle.
Refer to High Frequency Antenna Replacement
in SI.
6. If a water leak into the vehicle from the antenna
base was verified, carefully inspect the headliner,
sun visor, overhead console, A-pillar trim, carpet,
etc. for damage. Also inspect any affected wiring
for possible corrosion. Repair/replace affected
components as necessary.
Parts Information
To obtain the High-Tech™ Clear Seam Sealer, contact
Kent Automotive at 1-888-YES-KENT
(1-888-937-5368).
Description
4828705
Important: Ensure to keep the antenna electrical
connector away from the sealer application. If sealer
gets into the connector, the antenna would require
replacement.
4.2. Apply a continuous, uniform bead of the seam
sealer, approximately 4–5 mm in height,
around the perimeter of the existing roof
opening water seal.
Part
Number
Kent® High-Tech Seam
Sealer Clear
P10200
High Frequency Antenna
Refer to GM
Parts
Catalog for
Latest P/N
by VIN
Qty
5 oz.
1
Page 4
November, 2017
Bulletin No.: 17-NA-214
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
3480548*
Replace High Frequency
Antenna and Add Seam
Sealer
1.3 hrs
*This is a unique Labor Operation for Bulletin use only.
Version
2
Modified
November 20, 2017 — Added Model Year 2018
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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