18NA182

Bulletin No.:
Service Bulletin
Date:
18-NA-182
March, 2019
INFORMATION
Subject:
Brand:
Information on Water Leaks in Rear Cargo Area, Rear Compartment Well, Possible
Loss of Chime and/or Radio Functions
Model:
Model Year:
VIN:
from
to
from
to
Engine:
Transmission:
Chevrolet
Bolt EV
2017
2019
All
All
Opel
Ampera-e
2017
2019
All
All
Involved Region or Country
North America, Korea, Europe, Middle East
Condition
Some customers may comment on water leaking into the rear cargo area, with water
evident on interior trim, the cargo area floor and/or water in the rear compartment well.
Sometimes water intrusion may lead to loss of chime and/or radio functions.
Cause
Correction
The cause of the condition may be open body seams or voids in body sealer in several
areas on the vehicle. Or the cause has sometimes been found to be unsealed bolt
threads or a mis-positioning of grommets.
Important: Repair or replace any water damaged trim or components as necessary.
Verify the condition, then identify and repair the leak path following the information
provided in the Service Information below.
Service Information
Checking the locations noted below, verify the
condition. Then as necessary, reposition/seal parts
and/or repair the leak path and apply the appropriate
sealant, referencing Body Waterleak Repair in SI.
Copyright 2019 General Motors LLC. All Rights Reserved.
Page 2
March, 2019
Bulletin No.: 18-NA-182
Pinhole in Roof Drip Rail
5074583
Note: In some cases, larger voids have sometimes
been found in the same rear roof seam area noted
above. Test the roof panel seam line by following
the recommended steps below:
5249870
1. Lower the rear of the headliner to gain access to
the roof seam. Refer to Headlining Trim Panel
Replacement in SI.
2. Spray a soapy solution on top of the roof at the
seam line.
3. Using a long nose spray nozzle, spray air on the
bottom of the roof seam between the headliner
and roof.
4. If air bubbles are visible on the top of the roof
seam, repair using an appropriate body shop
sealant and if necessary, touch up with the
appropriate color paint.
5. Reinstall the headliner. Refer to Headlining Trim
Panel Replacement in SI.
Bulletin No.: 18-NA-182
March, 2019
Page 3
Body Sealer Void Behind Rear Fascia
5074590
Body Sealer Crack Near Left Liftgate Shock Bracket
5074602
Page 4
March, 2019
Bulletin No.: 18-NA-182
Water Leak at Threads of Liftgate Hinge and
Shock Retaining Bolts.
Water Leak at Liftgate Wiring Harness
Grommets.
Note: Apply sealer to bolt threads (1).
Note: Reposition grommets so they are fully
seated (2).
5075032
5075040
Parts Information
Recommended sealers for this repair are: Kent®
High-Tech Seam Sealer Clear P/N P10200, Wurth
Euroseal Gel Clear P/N 18920104 or Crest Clear Seam
Sealer TJ-C.
Warranty Information
Use the appropriate labor operation for the repair
performed.
Version
2
Modified
Released May 31, 2018
March 05, 2019 – Added the 2019 Model Year and additional Roof Seam Leak Repair
Information.
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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