NHTSA ID Number: 11028942
Manufacturer Communication Number: PIT6456D
TSB/Document Date: 2026-02-23
Summary
This preliminary information communicates an issue with the key fob buttons inoperative and how to resync the fobs back to the vehicle.
Bulletin No.: PIT6456D
Service Bulletin
Date: February, 2026
PRELIMINARY INFORMATION
Subject:
Brand:
Key Fob Transmitter Buttons Inoperative
Model:
Model Year:
from
VIN:
to
Engine:
from
to
2024
All
All
All
All
BrightDrop
Zevo 400
BrightDrop
Zevo 600
2024
All
All
All
All
Enclave
2025-2026
All
All
All
All
Envision
2024-2026
All
All
All
All
CELESTIQ
2025-2026
All
All
All
All
CT5
2024-2026
All
All
All
All
Escalade
2023-2026
All
All
All
All
Escalade
ESV
2023-2026
All
All
All
All
ESCALADE
IQ
2025-2026
All
All
All
All
ESCALADE
IQL
2026
All
All
All
All
OPTIQ
2025-2026
All
All
All
All
LYRIQ
2023-2026
All
All
All
All
VISTIQ
2026
All
All
All
All
XT4
2024-2025
All
All
All
All
BrightDrop
400
2025-2026
All
All
All
All
BrightDrop
600
2025-2026
All
All
All
All
Corvette
2023-2026
All
All
All
All
Equinox
2025-2026
All
All
All
All
Colorado
2024-2026
All
All
All
All
Silverado EV
2024-2026
All
All
All
All
Suburban
2023-2026
All
All
All
All
Tahoe
2023-2026
All
All
All
All
Traverse
2024-2026
All
All
All
All
Acadia
2024-2026
All
All
All
All
2024-2026
All
All
All
All
2024-2026
All
All
All
All
Sierra EV
2024-2026
All
All
All
All
Terrain
2025-2026
All
All
All
All
Copyright 2026 General Motors
. All Rights Reserved.
Page 2
Brand:
February, 2026
Model:
Bulletin No.: PIT6456D
Model Year:
from
VIN:
to
from
to
Engine:
Yukon
2023-2026
All
All
All
All
Yukon XL
2023-2026
All
All
All
All
Involved Region or Country
North America
Condition
A customer may comment that one of their key fobs does not function, all fob buttons are
inop.
The fob will work passively for unlocking and allows the vehicle to start as normal when in
the vehicle.
Any additional fobs learned to the vehicle function normally.
Cause
The cause of this condition could be the key fob transmitter being out of synchronization
with the Body Control Module.
Correction
Note: Do not replace Key fobs or the K9 Body Control Module for this concern.
Confirm the customer concern and check the key fob battery by verifying the fob output is above 20% using
the EL-52545 signal strength meter after pressing a fob button ten times in a row.
After verifying the fob battery is good, use GDS2 and navigate to Module Diagnostics > Body Control Module > Data
Display > Keyless Entry Data list and view parameter "Synchronization Counter."
Press any fob button and see if the Synchronization Counter increases by one count for each button press.
If the counter is increasing but the vehicle is not responding to any of the button presses, then the fob is out of sync
with the Body Control Module.
To bring the fob back in sync with the BCM, repeatedly press any fob button on the affected fob until the vehicle
begins to respond to the button presses.
This may take up to 255 fob button presses.
If this procedure does not correct the concern, the bulletin does not apply and follow SI diagnostics.
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
2081378*
Key Fob Synchronization
0.4 Hrs.
*This is a unique Labor Operation for Bulletin use only.
Version
5
Modified
11/24/2025 Created on
01/19/2026 Update to the models and correction sections.
01/29/2026 Update to the correction sections.
02/03/2026 Update to the Condition, Cause, Correction and model sections.
2/20/2026 Update to the Model list
Bulletin No.: PIT6456D
February, 2026
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.
Page 3
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TSB/Document ID: PIT6456D
Replacement Service Bulletin Number:
MFR Communication Date: 2026-02-20
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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