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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