Bulletin No.: PIT5993F

Service Bulletin

Date: January, 2026

PRELIMINARY INFORMATION
Subject:
Brand:

No Crank Due To Dead Battery / Battery Draw / Unwanted Alarm
Model:

Model Year:
from

VIN:
to

from

Engine:

Transmission:

to

Cadillac

Escalade

2021 - 2026

All

All

All

All

Cadillac

Escalade
ESV

2021 - 2026

All

All

All

All

Chevrolet

Suburban

2021 - 2026

All

All

All

All

Chevrolet

Tahoe

2021 - 2026

All

All

All

All

GMC

Yukon

2021 - 2026

All

All

All

All

GMC

Yukon XL

2021 - 2026

All

All

All

All

Involved Region or Country

North America

Additional Options (RPO)

Theft-deterrent alarm system RPO UTT Or UTR

Condition

Some customers may comment on a low or dead battery, no crank due to a dead battery
or unwanted alarm.

Cause

These concerns could be caused by high resistance in the glass breakage loop, which is
shown below with a dotted red line. The glass breakage loop consists of the rear window
defogger grid and each rear quarter glass, which are all connected in series. Normally,
the complete glass breakage loop should have less than 20 ohms of resistance to
ground. If there is high resistance or a break at any place in this series circuit, it could
cause the condition.
Note: In some cases, the battery draw can only be duplicated if the vehicle is completely
closed up (all doors and hood latches tripped) and the vehicle is locked, but in other cases the vehicle does not need to be closed and locked up.

Copyright 2026 General Motors. All Rights Reserved.

Page 2

January, 2026

Bulletin No.: PIT5993F

6304616

Correction
Note: A low battery or battery disconnect can cause DTC B192A to set current in the BCM and for the DTC to clear
the BCM must run and pass its diagnostic for the DTC. The BCM runs the diagnostic when the theft system is
armed. To arm the theft system, perform the following: exit the vehicle with all the fobs and close all doors, liftgate
and hood. Then lock the vehicle with the fob and allow it to set for several minutes so the theft system arms. During
this time the BCM will test the glass breakage loop and if the loop is complete the DTC will go to history and if so
then no further repairs are needed.
To test the glass breakage loop, disconnect the battery and the BCM X4 and X7 connectors. Using the correct test
probe EL-35616-58 (BK) check for proper terminal tension at the BCM X7 terminal 27. If terminal tension is good,
then use an ohmmeter to check the resistance of the glass breakage loop to the BCM ground. Do this by connecting
one lead of the ohmmeter to the BCM ground at connector X4 terminal 24 or 25 and the other ohmmeter lead to
terminal 27 of the BCM X7 connector. Measure the resistance.
If the resistance to ground is greater than 20 ohms, then inspect the glass breakage loop for poor connections,
which could occur at any point in the series circuit, shown above. The most common areas seen are the connections
at either of the rear quarter glass assemblies.
Note: In some cases, it has been found that the connection issues at the rear quarter glasses were caused by the
installation of aftermarket window tint, decals, stickers, etc. and these types of failures are NOT covered under
warranty.
If an open circuit is not found and there is a B192A set as either active or in history, please contact TAC for further
instructions.
If the resistance to ground is less than 20 ohms, then the loop resistance is within spec, but if you are dealing with
an intermittent issue then inspect and manipulate the glass breakage loop connections/wiring to see if the resistance
increases. Repair any points of high resistance.

Warranty Information
For vehicles repaired under warranty, please use the appropriate warranty labor operation based on the actual
cause and repair.
Note: In some cases, it has been found that the connection issues at the rear quarter glasses were caused by the
installation of aftermarket window tint, decals, stickers, etc. and these types of failures are NOT covered under
warranty.

Bulletin No.: PIT5993F

January, 2026

Page 3

Additional SI Keywords
B192A draw lo low parasitic
Version

7

Modified

03/23/2023 - Created on.
05/15/2024 - Update to the model year.
04/25/2023 - Update to the Cause, Correction and Warranty sections
12/03/2024 - Update to the model year.
03/07/2025 - Update to the Correction section
10/22/2025 - Update to the Models and Correction sections.
01/15/2026 - Update to the Correction section.

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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