Bulletin No.: PIT6288H

Service Bulletin

Date: June, 2026

PRELIMINARY INFORMATION
Subject:
Brand:

Model:

Model Year:
from

VIN:
to

from

Engine:

Transmission:

to

Cadillac

Escalade

2025-2026

All

All

All

All

Cadillac

Escalade
ESV

2025-2026

All

All

All

All

Chevrolet

Suburban

2025-2026

All

All

All

All

Chevrolet

Tahoe

2025-2026

All

All

All

All

GMC

Yukon

2025-2026

All

All

All

All

GMC

Yukon XL

2025-2026

All

All

All

All

Involved Region or Country

North America

Condition

Some customers may comment on a "Service Door Latch System" message.

Cause

The cause of this concern could be that the rear child door lock safety feature is out of
sync or a mismatch between the left rear door and right rear door. In addition, On 2025
GMC Models built before Feb 24, 2025, if this error would occur the Child Safety Lock
On/Off buttons are inoperative due to a calibration issue.

6769032

Copyright 2026 General Motors. All Rights Reserved.

Page 2

June, 2026

Bulletin No.: PIT6288H

Correction
- On 2025 GMC models build before Feb 24, 2025:
Reprogram the A11 Radio with the latest USB and SPS cals available in TLC/SPS. This will enable the child safety
lock on/off buttons during an error condition. You must follow ALL SI USB and SPS PROGRAMMING and Setup
steps for the A11 Radio: Programming and Setup. After reprogramming follow the information below.
- All models:
Reprogram the BCM with the latest calibrations listed in TLC/SPS.
Try to resync the rear door child safety locks by opening all doors and leave open. Then go into the radio display
and cycle the child safety locks on and off. There are two different areas, within the radio, where the Child Safety
Locks can be cycled on and off. It is important that you are at the screen shown above or it will not cycle the child
safety lock actuators and show it is grayed out. To get to this screen go to the radio display home screen > select
Controls > See More Controls > Doors & Windows > Child Safety Locks > On and Off. This will cycle both rear door
child safety lock actuators, which if out of sync will bring them back into sync with each other and clear the message.
• If cycling the child safety locks resolves the concern, advise the customer that this condition may occur if the
child safety locks are being turned on or off while someone in the rear seat is pulling on the interior door handle.
Performing both actions at the same time can cause the system to go out of sync. Advise the customer that if
this condition occurs again, they should first ensure that neither rear interior door handle is being pulled and that
both handles are fully released. Then, cycle the child safety locks off and back on using the radio screen to
restore proper synchronization.
• If cycling the child safety locks on and off does NOT correct the concern, use GDS2 and go into the BCM> Data
Display > Vehicle Access Data and monitor the following two parameters: Right Rear Child Security Lock - Lock
Command and the Left Rear Child Security Lock - Lock Command to see if they both are synced with each
other. Here are some reasons that the rear child safety locks may not be synced with each other:
1. The child safety lock feature may not function properly and go out of sync if there is preload on the door latch
caused by the inside door handle or cable. This preload can result from a misinstalled, binding, or kinked inside door
handle cable, or from the inside handle being pulled, creating slight tension on the latch. Even a minimal amount of
preload may prevent the child safety lock from engaging or disengaging when cycled.To ensure there is NO preload
on the door latch from the cable, remove the interior door panel on the affected door and disconnect the door latch
cable from the inside door handle. While the cable is disconnected, resync the child safety locks on and off as
outlined above to restore proper synchronization. If this resolves the concern, reconnect the inside door handle
cable, ensuring it is correctly routed, free of kinks or binding, and properly connected to the handle.
2. An issue with the feedback circuits 3269 or 3268, see example doc ID 6614043.
3. A fault with the child safety lock actuator circuits 3266, 2679, 2680, see example SI doc ID 6614044.
4. For more information, please follow normal SI diagnostics for "Power Door Child Lock Malfunction".
After the fault is found and corrected then cycle the Child Safety lock feature on and off to resync and clear the
service door latch message.

Bulletin No.: PIT6288H

June, 2026

Page 3

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

* 6486278

GMC/Cadillac/Chevrolet
Models - Cycle the child
safety door locks.

0.3 Hrs.

Add Time

2025 GMC Models built
before Feb 24, 2025 - USB
and SPS Reprogram the
A11 Radio

Claim up to
1.3 Hrs.

Add Time

Reprogram K9 BCM

0.5 Hrs.

Use if the K9 BCM
Programming is block due
to already up to date.

0.2 Hrs

*This is a unique Labor Operation for Bulletin use only.

Additional SI Keywords
DTC B11A2 B171C B1804 B11A4 B125D B1805
Version

9

Modified

11/22/2024 - Created on.
12/05/2024 - Update correction.
12/13/2024 - Update to the correction section.
01/08/2025 - Update to the correction and warranty sections.
02/27/2025 - Update to the correction section.
03/18/2025 - Update to the Correction, Cause, and Warranty sections.
04/01/2026 - Update to the Cause, Correction, Models and Warranty sections.
04/21/2026 - Update to the Correction and Warranty sections.
06/08/2026 - Update to the Correction and Warranty sections.

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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