NHTSA ID Number: 11027614
Manufacturer Communication Number: PIC6566B
TSB/Document Date: 2026-01-14
Summary
This Preliminary information communicates to dealership technicians to perform the reset for the 2 modules noted above.
Bulletin No.: PIC6566B
Service Bulletin
Date: January, 2026
PRELIMINARY INFORMATION
Subject:
Brand:
Image Processing Module/Video Processing Module Reset Instructions
Model:
Model Year:
from
VIN:
to
from
Engine:
to
CT4
2023-2026
All
All
All
All
LYRIQ
2024-2025
All
All
All
All
XT4
2024-2025
All
All
All
All
Blazer EV
2024-2026
All
All
All
All
BrightDrop
Zevo 400
2024
All
All
All
All
BrightDrop
Zevo 600
2024
All
All
All
All
BrightDrop
400
2025
All
All
All
All
BrightDrop
600
2025
All
All
All
All
Colorado
2023-2026
All
All
All
All
Encore GX
2023 - 2026
All
All
All
All
Canyon
2023-2026
All
All
All
All
Silverado EV
2024-2025
All
All
All
All
Silverado LD
2024-2026
All
All
All
All
Silverado HD 2024-2026
All
All
All
All
Sierra LD
2024-2026
All
All
All
All
Sierra HD
2024-2026
All
All
All
All
Involved Region or Country
Condition
Copyright 2026 General Motors
. All Rights Reserved.
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
Some Customers may comment on a condition present on startup 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.
Page 2
January, 2026
Bulletin No.: PIC6566B
6713886
The following DTC's may be present as Current DTC's:
DTC Set By DTC Description
U023C SYM00 CGM, EBCM Loss of Communication with VPM
B1596 SYM82 VCU/Radio VPM LVDS Coaxial Signal - Alive Sequence Counter Incorrect
B1596 SYM86 VCU/Radio VPM LVDS Coaxial Signal - Signal Invalid
B1A62 SYM82 CSM/Radio Rear Vision Camera Alive Sequence Counter Incorrect
B1A62 SYM86 CSM/Radio Rear Vision Camera Signal Invalid
Cause
This may be due to software anomalies that may be corrected by a reset of the module.
Correction
Shift to Reverse and verify RVC status. If the screen below appears, start with Step 1.
Bulletin No.: PIC6566B
January, 2026
Page 3
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 toPIC6540Radio reset
instructions
IVE with UKL
A11 Radio
Refer toPIC6540Radio 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.
Page 4
January, 2026
Bulletin No.: PIC6566B
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)
2. If B1596 SYM82 SYM86 or B1A62 SYM82 SYM86 are set as Current by the CSM/Radio, check for software
updates of the applicable module(s) based on option codes the vehicle is equipped with.
a. After software update and 3-minute sleep cycle, recheck DTCs.
i. If B1596 / B1A62 are now History, Shift to Reverse and verify RVC function.
1. Clear DTCs, Road test the vehicle (under conditions for setting the DTC), shift to Reverse, verify RVC function.
2. Check DTCs
a. If DTC returns, replace the coax cable between the Radio and VPM.
b. If DTC does not return, all ok.
ii. If B1596 / B1A62 are still set Current, check the coax cable with the Fakra tool (Refer to SI Document # for
B1596 /B1A62).
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
6629852
K124 Image Processing
Module Reset
0.5 Hr.
3459852
K157 Video Processing
Module Reset
0.5 Hr.
Version
3
Modified
08/20/2024 - Created On.
03/28/2025 - Updated models and correction.
01/06/2026 - Updated models.
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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TSB/Document ID: PIC6566B
Replacement Service Bulletin Number:
MFR Communication Date: 2026-01-10
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: UNKNOWN OR OTHER
MFR Component System:
MFR Component Subsystem:
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