NHTSA ID Number: 11023342
Manufacturer Communication Number: PIT6393C
TSB/Document Date: 2025-09-25
Summary
This Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it.
Cause
Concerns may be software, connection, or hardware.
Correction
Step 1: For a blank or black cluster and radio display only, refer to SI diagnostics. For a blank/black radio display
only, refer to PIC6540 and perform a reset on the radio to see if display returns. If the display returns continue to
step 2. If display does not return, follow normal SI diagnostics. If SI diagnostics lead you to replacing the radio or
customer complaint is not related to blank or black screens, proceed to step 2.
Step 2: Check for DTCs in or related to the radio. If a DTC is set refer to SI diagnostics. If SI diagnostics instruct you
to replace the radio go to step
Note: If the following DTC’s are set B1A1F.00, B1A1B.00, or U1516 and the vehicle can get the software listed in 25NA-085 or 25-NA-183 please update the radio it should correct the issue, if the vehicle is not currently listed in
software 25-NA-085 or 25-NA-183, please ignore them as they are setting due to a software anomaly. DO NOT
replace the radio for these DTCs
Note: If the following DTCs are set please ignore them as they are setting due to a software anomaly do not replace
the radio for any of these DTCs:, B1596.86, U0142, U0265, U164B, U1615
If No DTCs are set, proceed to step 3
Step 3: If customer concern is related to one of the symptoms below, verify customers radio is at the latest software
version refer to bulletin in table below.
Note: If symptom is related to a phone issue, please also make sure the customers phone is fully up to date
· Phone Projection/ Bluetooth/ Connectivity (IE Carplay and Android auto connection issues)
· Radio display flickering or going blank, but recovers
· Intermittent HUD functionality (if equipped with UV6)
· Audio issue
· Camera display
· Cluster functionality except for blank or black screens
· HVAC controls
Step 3. If concerns continue disconnect, inspect, and reconnect all related connections, clear any codes if any are
set and recheck for concern. If concern is still present, proceed to step 4
If concern is related to a blank or black cluster display that does not recover, proceed to step 5
Step 4. If the radio is not fixed with the latest software or reset, please inform the customer that GM is working on
several software improvements aimed at resolving current issues and improving overall functionality. Where
practical, dealers should encourage customers to wait until updated software becomes available and please do not
replace the radio, amplifier, speakers, radio display, Instrument panel display, or the Heads-up display
Model Year
Brand
Model
Latest Software Bulletin
2024
Bright Drop
Zevo 400/600
24-NA-092
2024
Envision
25-NA-183
2024
LYRIQ
24-NA-193
2024
XT4
25-NA-183
Bulletin No.: PIT6393C
September, 2025
Page 3
Model Year
Brand
Model
Latest Software Bulletin
2024
Blazer EV
24-NA-193
2024
Equinox EV
24-NA-193
2024
Silverado EV WT/RST
25-NA-085
2024
Traverse/Acadia
25-NA-183
2024
Canyon/Colorado
24-NA-193
2024
Sierra Denali EV
25-NA-085
2025
Envision
25-NA-183
2025
CT5
25-NA-085
2025
CT5 V and Blackwing only
25-NA-085
2025
Escalade IQ
25-NA-085
2025
Escalade/Escalade ESV
25-NA-183
2025
LYRIQ
Latest Software
2025
OPTIQ
25-NA-085
2025
XT4
25-NA-183
2025
Blazer EV except SS
24-NA-193
2025
Blazer EV SS Only
Latest Software
2025
Bright Drop
Zevo 400/600
24-NA-193
2025
Enclave
25-NA-183
2025
Equinox
25-NA-183
2025
Equinox EV
24-NA-193
2025
Silverado EV WT
Latest Software
2025
Silverado ESV RST
25-NA-085
2025
Tahoe/Suburban
25-NA-183
2025
Traverse
25-NA-183
2025
Canyon/Colorado
25-NA-085
2025
Acadia
25-NA-183
2025
Sierra Denali EV
25-NA-085
2025
Terrain
25-NA-183
2025
Yukon/Yukon XL
25-NA-183
2026
Enclave
Latest Software
2026
VISTIQ
Latest Software
2026
Equinox
Latest Software
2026
Traverse
Latest Software
2026
Acadia
Latest Software
2026
Terrain
Latest Software
Step 5 If the cluster display only or both cluster and radio display is still black or blank after following SI diagnostics
and a new radio is needed, these radios are currently restricted through the Electronic Service Center (ESC). Please
contact your preferred ESC to order the new radio. The ESC will require a response to the attestation question
before authorization will be provided. Attestation question: Have you followed, reset the module, installed the latest
software, disconnect and reconnect, and that the radio still requires a replacement?
Attestation question: Have you followed PIT6393, and require a radio replacement?
Page 4
September, 2025
Bulletin No.: PIT6393C
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
2810335
Radio Reprogramming with Use
SPS
Published
Labor Time
*3480578
Disconnect and reconnect
Radio module
1.8 Hr.
3420840
Radio Replacement
Use
Published
Labor Time
*This is a unique Labor Operation for Bulletin use only.
The new radio. The ESC will require a response to the attestation question before authorization will be
provided. Attestation question: Have you followed, reset the module, installed the latest software, disconnect and
reconnect, and that the radio still requires a replacement?
Attestation question: Have you followed PIT6393, and require a radio replacement?
Version
4
Modified
06/16/2025 - Created On
07/01/2025 - Updated to add ESC's in Correction and bulletin section, updated Models.
07/25/2025 - Updated bulletin section to current software.
09/15/2025 - Updated bulletin section to current software, updated vehicles in software
table.
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: PIT6393C
Replacement Service Bulletin Number:
MFR Communication Date: 2025-09-15
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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