18NA362

File in Section:
Bulletin No.:
Service Bulletin
Date:
18-NA-362
December, 2018
TECHNICAL
Subject:
Wind Noise and/or Water Leak at Front Roof or Windshield, Water Running Down
Interior A-Pillar
Attention: This Bulletin replaces PI1509A. Please discard PI1509A.
Brand:
Cadillac
Model:
Model Year:
VIN:
from
to
ATS
2014
2019
CTS Sedan
(VIN A)
2014
2015
CTS
2016
2019
from
to
Engine:
Transmission:
All
All
Involved Region or Country
North America and N.A. Export Regions
Condition
Some customers may comment on hearing a wind noise from the front roof/windshield
area, or on finding water/wet carpet in the front floor footwell area.
The cause of the condition may be pin holes, cracks or voids in the forward roof ditch
laser braze area, or in the upper windshield flange seam or lower corners of the
windshield opening. Examples of the leak areas are shown below.
Possible Laser Braze Water Leak Areas (1)
Cause
4233881
Copyright 2018 General Motors LLC. All Rights Reserved.
Page 2
December, 2018
Bulletin No.: 18-NA-362
Possible Windshield Opening Flange Seam Water Leak Areas (2)
4233886
Correction
Following the Service Procedure below, inspect the forward laser braze and water test
the roof ditch and upper windshield area on the affected side(s).
Bulletin No.: 18-NA-362
December, 2018
Page 3
Service Procedure
4233891
1. Ensure the front laser braze area, shown in the
graphic above, is clean and dry. Left side is shown,
right side is similar.
4233896
4233894
2. Remove the windshield garnish molding (1) on the
affected side(s). Refer to Windshield Garnish
Molding Replacement in SI.
3. Perform a water leak test on the forward laser
braze and upper windshield area using a water
hose without the nozzle attached. An example of
the area where to apply water is shown circled in
the graphic above.
Page 4
December, 2018
Bulletin No.: 18-NA-362
6. Seal the holes/crack in the laser braze following
the steps below:
6.1. Mix a small amount of *Kent Automotive
High-Tech Clear Seam Sealer, P/N 10200 (5
oz tube), or equivalent, WITH the proper
touch up paint color.
6.2. Avoiding excess sealer build up within the
ditch, work a small amount of the sealer into
the hole with a gloved finger.
6.3. Wipe away any excess sealer with a light
amount of solvent on a rag or paper towel.
The solvent will help the sealer flow into the
hole/crack.
4233898
4. Continue to flood the area for up to five minutes,
while having an assistant sit inside the vehicle
observing the interior A-pillar for any evidence of
water running along the pillar.
4233898
4233899
Note: The pin holes/cracks may be more difficult to
see on darker color finishes. An example of a visible pin
hole is shown in the graphic above.
5. If a water leak is verified, visually inspect the roof
laser braze for pin holes or a crack.
• If NO holes/cracks are evident, move ahead to
step # 8 and perform the windshield resealing.
• If any holes/cracks are evident, continue ahead
to step # 6.
7. Re-water test the repaired side(s) and inspect for
any water visible at the interior A-pillar.
Important: The tether clip at the lower portion of the
garnish molding is NOT reusable, and MUST be
replaced every time the windshield garnish molding is
removed.
• If NO water is visible, no further action is
required and the windshield garnish molding(s)
can be reinstalled. Refer to Windshield Garnish
Molding Replacement in SI.
• If water leaks are still evident, continue ahead
to the Windshield resealing procedure.
Bulletin No.: 18-NA-362
December, 2018
Page 5
4240047
8. Remove the windshield (1). Refer to Windshield
Replacement in SI.
4233900
Note: The examples above are showing the left side,
but condition could be on either side.
9. On the affected side(s), inspect the upper
windshield flange seam (at the end of the laser
braze) (1) and the lower corner flange seam (2) for
any visual signs of pin holes, voids or skips.
Reseal any seams, as necessary.
Page 6
December, 2018
Bulletin No.: 18-NA-362
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
0580158*
Water Test, Apply Sealer at
Laser Braze - One Side
0.7 hr
Add
Water Test, Apply Sealer Both Sides
0.4 hr
Add
Remove and Reseal
Windshield
1.2 hrs (ATS)
2.2 hrs
(CTS)
*This is a unique Labor Operation for Bulletin use only.
4240047
10. Reinstall the windshield (1). Refer to Windshield
Replacement in SI.
Parts Information
Causal
Part
Part Number
Description
Material
Allowance
11611805
RETAINER
(CTS and
ATS Coupe)
NA
11611451
RETAINER
(ATS Sedan)
NA
See EPC
PAINT,
TOUCHUP TUBE
NA
P10200
Kent
Automotive
High-Tech™
Clear Seam
Sealer
$1.15 US /
$1.75
Canada
Obtain locally
Urethane
N/A
Max. $60.00
US / $85.00
Canada
Version
1
Modified
Released December 04, 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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