23-NA-203

Bulletin No.:
Service Bulletin
Date:
23-NA-203
November, 2023
INFORMATION
Subject:
Information on DTC U1122 - Lost Communication with Electric Park Brake Switch
Stored in History
Brand:
Model:
Brightdrop
Zevo 600
Involved Region or Country
Model Year:
VIN:
from
to
from
to
2023
2023
-
-
Engine:
Transmission:
All
All
North America
Service Procedure
Important: Service agents must comply with all
International, Federal, State, Provincial, and/or
Local laws applicable to the activities it performs
under this bulletin, including but not limited to
handling, deploying, preparing, classifying,
packaging, marking, labeling, and shipping
dangerous goods. In the event of a conflict between
the procedures set forth in this bulletin and the
laws that apply to your dealership, you must follow
those applicable laws.
Important: This technical service bulletin (TSB) can
only be completed by BrightDrop dealers or BrightDrop
certified repair facilities who have met all BrightDrop
specific training, tool and equipment requirements.
Repairs must be performed by a technician who has
successfully completed the required training.
If a vehicle presents itself with the U1122.00 DTC
stored in history, Do NOT make any attempts at repair/
diagnosis.
Important: Do not replace parts for this condition.
U1122.00 is a false setting DTC if stored in history.
Version
1
Modified
Released November 16, 2023
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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