Bulletin No.:

Service Bulletin

Date:

17-NA-012
January, 2020

TECHNICAL
Subject:

Poor AM Radio Reception

Brand:

Model:

Buick

Cascada

Model Year:

Date Breakpoint:

from

to

2016

2019

from

to

Engine:

Transmission:

All

All

Involved Region or Country

North America

Condition

Some customers may comment that no AM stations are available and/or if an AM station
is available, static is the predominant audio.

Cause

The initial release of the antenna was not optimal for AM reception.

Correction

4691886

Important: Prior to replacement, the customer must be consulted on the visual
difference between both antenna versions. The customer must understand the
appearance change and the antenna exchange should only take place after a customer
agreement is obtained.
Replace the existing “shark fin” antenna (1) with the new Hex Band antenna (2) kit
following the Service Procedure below.

Copyright 2020 General Motors LLC. All Rights Reserved.

Page 2

January, 2020

Bulletin No.: 17-NA-012

Service Procedure

4691899
4691889

Note: The new Hex Band antenna kit contains a
jumper cable, antenna mast and base. The base will
need to be painted to match the color of the vehicle,
prior to installation.

3. Install the new Hex Band antenna base and mast
from the kit. The electrical connectors will be
connected in a later step when the antenna jumper
cable is connected. Refer to Communication
Module Antenna Replacement in SI.

Important: Before disconnecting the battery cable,
make sure to turn on the radio and record all of the
customer radio station presets.
1. Disconnect the battery negative cable. Refer to
Battery Negative Cable Disconnection and
Connection in SI.

4701758

4691894

2. Remove the existing communication module
antenna (1). Refer to Communication Module
Antenna Replacement in SI.

4. Power the stowage compartment lid to open
position and the rear roof tension bow up. Use a
support rod (1) to secure the tension bow (2) while
the hydraulic system loses pressure after few
minutes, and the tension bow folds down.
5. Remove the folding top stowage compartment (3).
Refer to Folding Top Stowage Compartment
Replacement in SI.

Bulletin No.: 17-NA-012

January, 2020

4701763

6. Reach through the left side trim and manually
release the rear compartment lid using the
emergency trunk release handle (1) on the lid.

4691916

7. Manually position the folding top stowage
compartment lid (1) in the forward/down, but not
latched, position. Then position the rear roof
tension bow (2) down, resting on the stowage
compartment lid.

Page 3

4691902

8. Remove the rear compartment floor trim panel.
Refer to Rear Compartment Floor Panel Trim
Replacement in SI.

4701759

9. Remove the right and left quarter inner trim finish
panels. Refer to Quarter Inner Trim Finish Panel
Replacement - Right/Left Side in SI.

Page 4

January, 2020

Bulletin No.: 17-NA-012

4691922

10. Detach the rear compartment lid grommet (1) from
the compartment lid.

4691928

12. Continue to route the cable along the compartment
lid harness, install the cable connector (1) to the
communication module antenna connector (2) and
connect the electrical connectors (3).

4691937

11. Position the communication module antenna
end (1) of the antenna jumper cable through the
rear compartment grommet (2) and into the small
opening (3) of the rear compartment lid, behind the
compartment harness. Feed the cable and pull the
end of the cable through the larger opening as
shown above.

4691943

Note: Use additional tie straps as needed. All tie
straps referenced are to be obtained locally.
13. Secure the cable to the harness with three tie
straps (1) and trim off excess length.

Bulletin No.: 17-NA-012

January, 2020

4691948

14. Detach the body side grommet (2) from the
compartment lid wiring harness sleeve (1).
15. Feed the radio antenna module end of the jumper
cable through the wiring harness sleeve and
through the body side grommet.

Page 5

4691958

17. Route the cable inside the plastic corner trays and
along the cross-car harness. Tuck the cable
underneath the left and right side rear floor panel
carpet, in area circled.

4696207
4691956

16. Route the cable into the rear compartment, above
the module pack and forward along the left side
body harness, as shown in the graphic above.

18. Continue routing the cable along the lower body
wiring harness on the right side of the rear
compartment.

Page 6

January, 2020

4691967

19. Disconnect the black electrical connector (1) from
the radio antenna module (2).

4691971

20. Connect the antenna jumper cable end connector
(1) to the black electrical connector (2).
21. Push the cable downward to route under the
antenna module.

Bulletin No.: 17-NA-012

Bulletin No.: 17-NA-012

January, 2020

Page 7

4696210

Note: Use additional tie straps as needed.
22. Secure the cable to the right body harness with
eight tie straps (1) and trim off excess length.

4691977

23. Secure the forward cross-car routing of the cable
with one tie strap (1) and trim off excess length.

Page 8

January, 2020

Bulletin No.: 17-NA-012

4691981

Note: Use additional tie straps as needed.
24. Secure the cable to the left side body harness with
five tie straps (1) and trim off excess length.

4691909

25. Reinstall the right/left quarter inner trim finish
panels and the folding top stowage compartment.
Refer to Quarter Inner Trim Finish Panel
Replacement - Right/Left Side in SI.

Bulletin No.: 17-NA-012

January, 2020

Page 9

Important: As shown in the string of screen shot
illustrations below, the technician must select“Hex
Band Antenna – Use only per bulletin 17-NA-012” to
get the correct calibration files for the Hex Band
antenna.
30. Program the radio control module (A11) with SPS.

4691902

26. Reinstall the rear compartment floor trim panel.
Refer to Rear Compartment Floor Panel Trim
Replacement in SI.
27. Reposition the compartment lid harness sleeve
and grommets.

4691998

4691989
4692007

28. Reinstall the compartment lid inner trim panel (1).
Refer to Rear Compartment Lid Inner Panel Trim
Replacement in SI.
29. Reconnect the battery negative cable. Refer to
Battery Negative Cable Disconnection and
Connection in SI.

Page 10

January, 2020

Bulletin No.: 17-NA-012

Parts Information
Description

Part
Number

Qty

ANTENNA PKG-M/TEL

39083861

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.

4696213

31. Program volatile memory. Refer to Volatile Memory
Programming in SI.
32. Program all of the customer's radio station presets
and set the radio clock to the current time.

Labor
Operation

Description

Labor
Time

Paint
Code

3480488*

Install Radio
Antenna Kit

1.6 hrs

-

Add

Paint and Clear Coat
Antenna Base

0.4 hr

GD

*This is a unique Labor Operation for bulletin use only.

Version

2

Modified

Released March 7, 2017
January 16, 2020 – Added the 2018 and 2019 Model Years, updated the Condition and
Cause sections and updated the Warranty statement.

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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