PIT6369B Service Bulletin/Repair Instructions

Bulletin No.: PIT6369B
Service Bulletin
Date: January, 2026
PRELIMINARY INFORMATION

Subject:

Brand:
Image Processing Module/Video Processing GEN2 Module Reset Instructions

Model:
Model Year:

from
VIN:

to
from
Engine:
Transmission:
to
BrightDrop
Zevo 600
2023
All
All
All
All
Buick
Encore GX
2023 - 2026
All
All
All
All
Buick
Envision
2021-2023
All
All
All
All
Buick
Envision Plus 2022-2023
All
All
All
All
Cadillac
CT4
2021-2026
All
All
All
All
Cadillac
CT5
2021-2024
All
All
All
All
Cadillac
Escalade
2021-2024
All
All
All
All
Cadillac
Escalade

ESV
2021-2024
All
All
All
All
Chevrolet
Corvette
2023-2025
All
All
All
All
Chevrolet
Silverado
2022-2023
All
All
All
All
Chevrolet
Suburban
2022-2024
All
All
All
All
Chevrolet
Tahoe
2022-2025
All
All
All
All
GMC
Hummer EV

Pickup
2022-2025
All
All
All
All
GMC
Hummer EV

SUV
2024-2025
All
All
All
All
GMC
Sierra LD
2022-2023
All
All
All
All
GMC
Yukon
2022-2024
All
All
All
All
GMC
Yukon XL
2022-2024
All
All
All
All
Involved Region or Country
United States, Canada, Mexico, Europe, Kazakhstan, Uzbekistan, Russia, Middle East,

Iraq, Israel, Palestine, Argentina (Mercosur), Brazil (Mercosur), Chile (West), Colombia

(West), Ecuador (West), Japan, Cadillac Korea (South Korea), Thailand (ASEAN),

Singapore, Philippines, Australia/New Zealand, Caribbean, China
Additional Options (RPO)
TRG, UKL, UV2 and UXP
Copyright 2026 General Motors. All Rights Reserved.
Page 2
January, 2026
Bulletin No.: PIT6369B
Some customers may comment on a condition present when shifting to Reverse gear on

the Radio Display where a black screen with a triangle and a camera with a slash through

it is displayed.

In addition, it may not be possible to launch the camera app from the Radio home screen.
Condition
6713886
Note: This PI only will apply to GEN2 Modules. Please make sure you are looking at the

correct Model and Year of the vehicle that is being diagnosed.

The following DTC's may be present as Current DTC's:

Cause
This may be due to software anomalies that may be corrected by a reset of the module.
DTC
Set By
DTC Description
U023C SYM00
CGM, EBCM
Loss of Communication with VPM
B1A62 SYM82
CSM/Radio
Rear Vision Camera Alive Sequence

Counter Incorrect
B1A62 SYM86
CSM/Radio
Rear Vision Camera Signal Invalid
B1A62 SYM46
VPM
Rear Vision Camera – Calibration /

Parameter Memory Failure
B1A62 SYM49
VPM
Rear Vision Camera - Internal

Electronic Failure
B1A62 SYM54
VPM
Rear Vision Camera - Missing

Calibration
B1A62 SYM55
VPM
Rear Vision Camera - Not

Configured
B1A62 SYM92
VPM
Rear Vision Camera - Performance

or Incorrect Operation
B1A62 SYM98
VPM
Rear Vision Camera - Component or

System Over Temperature
Bulletin No.: PIT6369B
January, 2026
Page 3
DTC
Set By
DTC Description
B1A9B SYM00
VPM
Rear Vision Camera - Temperature

Below Threshold
B1594 SYM11
VPM
Rear Vision Camera Low Voltage

Differential Signaling LVDS Coaxial

Signal - Circuit Short To Ground
B1594 SYM12
VPM
Rear Vision Camera Low Voltage

Differential Signaling LVDS Coaxial

Signal - Circuit Short To Battery
B1594 SYM13
VPM
Rear Vision Camera Low Voltage

Differential Signaling LVDS Coaxial

Signal - Circuit Open
B1594 SYM29
VPM
Rear Vision Camera Low Voltage

Differential Signaling LVDS Coaxial

Signal - Signal Invalid
B1594 SYM82
VPM
Rear Vision Camera Low Voltage

Differential Signaling LVDS Coaxial

Signal - Alive / Sequence Counter

Incorrect / Not Updated
Correction

Shift to Reverse and verify RVC status. If the screen below appears, start with Step 1.
6713886
1. If U023C SYM00 is set as Current by the CGM or EBCM, then check if Warranty Labor Code 3459852 has previously been performed on this vehicle.

a. If this is a repeat visit for the same concern, Replace the VPM (Refer to SI Document: Video Processing Module

Replacement).

b. If this is the first visit for this concern, refer to the chart below and perform fuse reset(s) based on option codes

vehicle is equipped with.

Option code vehicle is equipped

with
Module
Action needed to perform system

reset
IVE and UV2 without UKL
A11 Radio
Refer to PIC6540 Radio reset

instructions
Page 4
January, 2026
Bulletin No.: PIT6369B
Option code vehicle is equipped

with
Module
Action needed to perform system

reset
IVE with UKL
A11 Radio
Refer to PIC6540 Radio reset

instructions
K124 Image Processing Module
Remove and reinstall fuse to K124

Image processing module. Refer to

SI diagnostics for specific vehicle

application
IVD with UKL
K124 Image Processing Module
Remove and reinstall fuse to K124

Image processing module. Refer to

SI diagnostics for specific vehicle

application
IVD and UV2 or UXP without UKL
K157 Video processing module
Remove and reinstall fuse to K157

Video processing module. Refer to SI

diagnostics for specific vehicle

application
UV2 or UXP without IVD or IVE
K157 Video processing module
Remove and reinstall fuse to K157

Video processing module. Refer to SI

diagnostics for specific vehicle

application
c. After fuse pull, perform a 3-minute sleep cycle and then recheck for DTCs

i. If U023C is now in History, Shift to Reverse and verify RVC function.

1. Clear DTCs and all ok.

ii. If U023C is still Current, diagnose Power/CAN cable to VPM (Refer to SI Document for U023C) and then

recheck DTCs

1. If U023C is now history, Shift to Reverse and verify RVC function.

a. Clear DTCs and all ok.

2. If U023C is still Current, Replace the VPM ( Refer to SI Document; Video Processing Module Replacement)

1. If B1A62 82 86 are set as Current by CSM/Radio, check for software updates of the applicable module(s) based

on option codes vehicle is equipped with.

a. After software update and 3 minute sleep cycle, recheck DTCs.

i. If B1A62 82 86 are now in History, Shift to Reverse and verify RVC.

1. Clear DTCs, Road test vehicle (under the conditions for setting the DTC),shift to Reverse, verify RVC.

2. Check DTCs

a.If DTC returns, replace the coax cable between Radio and VPM.

b. If DTC does not return, all ok.

ii. If B1A62 82 86 are still Current, check coax cable with Fakra tool (Refer to SI document # for B1A62).

2. If B1A62 46 49 54 55 92 98/ B1A9B 00/ B1594 11 12 13 29 82 are set as Current by VPM, check for software

updates of the applicable module(s) based on option codes vehicle is equipped with.

a. After software update and 3 minute sleep cycle, recheck DTCs

i. If B1A62/ B1A9B/ B1594 are now in History, Shift to Reverse and verify RVC.

3. Clear DTCs, Road test vehicle (under the conditions for setting the DTC),shift to Reverse, verify RVC.

4. If DTC does not return, all ok.

i. If B1A62/ B1A9B/ B1594 are still Current, check coax cable between Rear Camera and VPM with Fakra tool.

1. If coax cable is ok, replace the Rear Camera.
Bulletin No.: PIT6369B
January, 2026
Page 5
2. If coax cable is not ok, replace the coax cable between Rear Camera and VPM.

3. If DTC does not return, all ok.
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
3480178*
K124 Image Processing

Module Reset
0.5 Hr.
3480328*
K157 Video Processing

Module Reset
0.5 Hr.
Additional SI Keywords

U023C, B1A62, B1596, Black Screen

Version
3
Modified
04/17/2025 - Created on.

04/29/2025 - Updated to remove DTC B1596 from keyword list.

01/09/2026 - Updated vehicle list
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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