Service Bulletin

Bulletin No.:

21-NA-048

Date:

May, 2021

TECHNICAL
Subject:

Black Screen in Reverse with Red Triangle and Red Camera with A Circle and Slash
Through It
This bulletin replaces PIC6420D. Please discard PIC6420D.

Brand:
Cadillac

Model:

Model Year:
from

to

VIN:
from

XT5
XT6

GMC

Acadia

Holden

Acadia

Engine:

Transmission:

All

All

to
1GYKNDRS0MZ163846

2020

2021

SOP

1GYKPHRS3MZ163843
1GKKNRL47MZ163831

2020

Involved Region or Country

2020

North America, Israel, China, Saudi Arabia, Korea, Germany, Russia, Middle East,
Palestine, Japan, S. Korea, Australia and New Zealand.

Additional Options (RPOs)

Condition

5758378

Some customers may comment on seeing a black screen with red triangle and red
camera with a circle and slash through It when vehicle is in Reverse. This condition may
be intermittent.
Cause

The cause of the condition may be that the crimping of the coaxial cable connectors to
the cable is causing an excessive resistance that interrupts the video signal and causes
the black screen.

Correction

Note: Verify the Condition, then depending on Model and Year, follow the appropriate
repair in the list of Repair Procedures below.

Copyright 2021 General Motors LLC. All Rights Reserved.

Page 2

May, 2021

Bulletin No.: 21-NA-048

Preliminary Service Procedure
For 2020 GMC Acadia, Holden Acadia, XT5 and XT6
Model Year vehicles ONLY, do the following check:
Note: This issue may be found on a small percentage
of vehicles.
1. Verify that the A11 Radio header is not loose.
1.1. To do this, gain access to the IP coaxial cable
behind the right kick panel.
1.2. Hold the cable an inch or two below the
connection to the A11 Radio and while
watching the screen in Reverse, gently move
the cable back and forth.
1.3. If you get pink lines on the screen or if it goes
black, replace the A11 Radio. Refer to the
appropriate Radio Replacement, in SI.
2. Continue to coaxial replacement as shown by
model below.

Service Procedure - For 2020 and 2021 Model
Year vehicles, replace the following coaxial
cable(s)
XT6 Models – Replace only the (IP) coaxial cable
from the in-line connector to the A11 Radio.
2020-2021 XT6 IP Coaxial Cable Routing (DRZ
& UV2)

5757456

Bulletin No.: 21-NA-048

May, 2021

Page 3

1. A11 Radio
2. IP Coax
3. IP to Body Coax In-line Connection
Replace the short (IP) coaxial cable from the in-line
connection to the A11 Radio, located behind the right
kick panel.
For XT5 and Acadia Models, replace the (Body)
coaxial cable from the Video Processing Module
(VPM) to the in-line connector AND the (IP) coaxial
cable from the in-line connector to the A11 Radio.
XT5
2020-2021 XT5 IP and Body Coaxial Cable Routing
(DRZ & UV2)

5757457

1. A11 Radio
2. IP Coax
3. IP to Body Coax In-line Connection
4. Body Coax
5. To Headliner
6. To Liftgate Harness
7. VPM
Note: The long cable will be an overlay routed with,
and affixed to, the body harness. The original body
coax will just need the ends off and can be abandoned
in the main body wiring harness.

Note: On XT5, the (Body) cable runs from the VPM to
the In-line connection to the (IP) short cable behind the
right kick panel. It also routes to the liftgate coaxial
connector and to the coax at the top of the left "D" pillar
headliner area for the rearview mirror.
1. Replace the long Coaxial cable (Body) from the
VPM in the left rear of the vehicle, to the In-line
connection to the (IP) short cable behind the right
kick panel and to the liftgate connector and
connect to the cable to the rearview mirror in the
top left “D” pillar headliner area.
2. Replace the short (IP) coaxial cable from the in-line
connection to the A11 Radio, located behind the
right kick panel.

Page 4

May, 2021

Bulletin No.: 21-NA-048

GMC Acadia
2020-2021 GMC Acadia IP and Body Coaxial Cable
Routing (UV2)

5757468

1. A11 Radio
2. IP Coax
3. IP to Body Coax In-line Connection
4. Body Coax
5. To Liftgate Harness
6. VPM
Note: The long cable will be an overlay routed with,
and affixed to, the body harness. The original body
coax will just need the ends off and can be abandoned
in the main body wiring harness.

Note: On GMC Acadia, the (Body) cable runs from the
VPM to the In-line connection to the (IP) short cable
behind the right kick panel and to the liftgate coaxial
cable connector.
1. Replace the long Coaxial cable (Body) from the
VPM in the left rear of the vehicle, to the In-line
connection to the (IP) short cable behind the right
kick panel and to the liftgate coaxial cable
connector.
2. Replace the short (IP) coaxial cable from the in-line
connection to the A11 Radio, located behind the
right kick panel.

Bulletin No.: 21-NA-048

May, 2021

Page 5

Holden Acadia
2020 Holden Acadia IP and Body Coaxial Cable
Routing (UV2)

5838142

1. A11 Radio
2. IP Coax
3. IP to Body Coax In-line Connection
4. Body Coax
5. To Liftgate Harness
6. VPM
Note: The long cable will be an overlay routed with,
and affixed to, the body harness. The original body
coax will just need the ends off and can be abandoned
in the main body wiring harness.
Note: On Holden Acadia, the (Body) cable runs from
the VPM to the In-line connection to the (IP) short cable
behind the left side of the IP near the glove box.
1. Replace the long Coaxial cable (Body) from the
VPM in the left rear of the vehicle, to the In-line
connection to the (IP) short cable behind the left IP
near the glove box and to the liftgate coaxial cable
connector.
2. Replace the short (IP) coaxial cable from the in-line
connection to the A11 Radio, located behind the
left IP near the glove box.

Parts Information
Causal
Part

Description

Part
Number

Qty

X

CABLE ASMDIGITAL RDO
ANT & NAVN ANT
COAX (Acadia)

86775887

1

X

CABLE ASMDIGITAL RDO
ANT & NAVN ANT
COAX (Acadia)

86775888

1

X

CABLE ASMDIGITAL RDO
ANT & NAVN ANT
COAX (XT5
/ XT6)

86775889

1

X

CABLE ASMDIGITAL RDO
ANT & NAVN ANT
COAX (XT5)

86775890

1

Page 6

May, 2021

Bulletin No.: 21-NA-048

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

3487258*

Replace (IP) Coax Cable from In-line Connector to the A11
Radio (XT6 Only)

0.5 hr

3487248*

Overlay Body Coax Cable from VPM to In-line Connector and
Replace the IP Coax Cable to the A11 Radio

2.0 hr

*This is a unique Labor Operation for Bulletin use only.
Any additional time for component R and R to gain access, or repair time greater than 2.0 hours, must be submitted as Other
Hours and requires appropriate authorization.

Version

2

Modified

Released March 05, 2021
Revised May 18, 2021 – Added 2020 Holden Acadia Model, Repair Section and Graphic,
Removed Date Breakpoint and Replaced with 3 VIN Breakpoints.

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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