23-NA-140 Service Bulletin/Repair Instructions

Bulletin No.:
Service Bulletin
Date:
23-NA-140

August, 2023
INFORMATION

Subject:
Information on Rear Tow Hook Mounting Bolt Bottoms Out Before Achieving Torque
Brand:
Model:
GMC
HUMMER EV SUV
Model Year:
VIN:
from
to
from
to
2024
2024
-
-
Engine:
Transmission:
All
All
Involved Region or Country
North America
Condition
Some customers may comment on when using the rear tow hook kit PN 84930570 or

86811294 on the SUV, the upper left rear tow hook mounting bolt is too long and bottoms

out on the trailer hitch bracket before achieving torque.
Cause
The cause of this condition may be the original rear tow hook kit had the incorrect longer

bolts in the kit.
Correction
Obtain the shorter mounting bolt and use it in the upper left location.
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 certified repair facilities who have

met all specific training, tool and equipment

requirements pertaining to the vehicle Brand and Model

serviced. Repairs must be performed by a technician

who has successfully completed the required training.
6407771
If you encounter a vehicle with the above concern,

replace the longer bolt with the shorter bolt.
Copyright 2023 General Motors LLC. All Rights Reserved.
Page 2
August, 2023
Bulletin No.: 23-NA-140
Parts Information

Causal

Part
Description
Part

Number
Qty
X
Bolt
11604317
1
Version
2
Modified
Released August 14, 2023

Revised October 12, 2023 – Updated Part Number from 11603720 to 11604317.
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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TECHNICIAN

CERTIFICATION

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