GLOBAL SAFETY FIELD INVESTIGATIONS
DCS6711
URGENT - DISTRIBUTE IMMEDIATELY
Date:

November 8, 2023

Subject: N232414770 - Service Update
Incorrect HVAC Coolant Sensor Harness
Models: 2024 Cadillac LYRIQ
Equipped with ELECTRIFIED PROPULS-ELECTRIC, BEV, GEN 3,
RWD,
CHASSIS DRIVE LINE-REAR WHEEL DRIVE (RWD) (RPO X0D,
RWL)
To:

All General Motors Dealers

General Motors is releasing Service Update N232414770 today. The total
number of U.S. vehicles involved is approximately 530. Please see the
attached bulletin for details.

Global Warranty Management (GWM)
The Required Field Action section on the Investigate Vehicle History (IVH) screen will
be updated November 8, 2023. A list of vehicles in dealer inventory is attached to this
message.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS

Service Update
N232414770 Incorrect HVAC Coolant Sensor Harness
Release Date:
Attention:

November 2023

Revision:

00

This service update includes vehicles in dealer inventory and customer vehicles that return to the
dealership for any reason. This bulletin will expire at the end of the involved vehicle’s New Vehicle Limited
Warranty period.
This field action must only be completed by Cadillac dealers who have met EV Readiness
Requirements, and the repair must be performed by a technician who has successfully completed the
required training.
For Canadian Dealers: Only Cadillac Dealers who have signed the Cadillac Retail and Facility
Standards Addendum and have met all the Cadillac LYRIQ-specific training, tools, and equipment
requirements are eligible to complete the repair. Any Dealer unsure of their eligibility status should
immediately review with their District Service Manager.

Make
Cadillac

Model
LYRIQ

Model Year
From
To
2024
2024

RPO
X0D,
RWL

Description
ELECTRIFIED PROPULSELECTRIC, BEV, GEN 3, RWD,
CHASSIS DRIVE LINE-REAR
WHEEL DRIVE (RWD)

Involved vehicles are marked “Open” on the Investigate Vehicle History screen in GM Global Warranty Management
system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections
and/or repairs.
Condition
Correction

Certain 2024 model year Cadillac LYRIQ RWD vehicles may have a condition where the wires to a
coolant sensor could create stress at the connector.
Dealers are to perform a Harness Clip adjustment.

Parts
Quantity
1

Part Name

Part No.
84112517

Harness Clip

It is estimated that only 557 involved vehicles will require parts replaced. Due to the small number of vehicles
anticipated that will need this fix and the limited initial parts availability, dealers are encouraged not to order
these parts for use as shelf stock.
Reminder: Parts may be removed from Retail Inventory Management (RIM). Dealers should review the affected parts to
confirm RIM managed status. Parts may have quantity limiters in effect.
Warranty Information
Labor
Operation
9106951

Description
Coolant Temperature Sensor B Harness Clip Rework

Labor
Time
0.4

Trans.
Type
ZFAT

Net
Item
N/A

Service Procedure
1.

Remove the Front Compartment Rear Access Cover. Refer to Front Compartment Rear Access Cover Replacement
in SI.

Copyright 2023 General Motors. All Rights Reserved.

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Service Update
N232414770 Incorrect HVAC Coolant Sensor Harness

6174112

2.

Locate the B388B Hybrid/Propulsion System Coolant Temperature Sensor 2 (1).

6408277

3.

Follow the B388B Hybrid/Propulsion System Coolant Temperature Sensor 2 wiring to the harness clip holding the
main harness wiring and the B388B Hybrid/Propulsion System Coolant Temperature Sensor 2 harness.

4.

Cut and DISPOSE of the harness clip tie strap that holds both the main harness bundle and the smaller coolant
temperature sensor branch.

5.

Reapply NEW clip tie strap to hold ONLY the larger main harness bundle, allowing the B388B Hybrid/Propulsion
System Coolant Temperature Sensor 2 harness to hang freely.

6.

Install the Front Compartment Rear Access Cover and Front Compartment Left Side Sight Shield. Refer to Front
Compartment Side Sight Shield Replacement in SI.

Dealer Responsibility
Whenever a vehicle subject to this service update enters your vehicle inventory or is in your facility for service in the
future, and the vehicle is still covered under the New Vehicle Limited Warranty, you must take the steps necessary to be
sure the service update correction has been made before selling or releasing the vehicle.
All new, used, GM Certified Used, courtesy transportation vehicles, dealer shuttle vehicles, etc. in dealers' possession
and subject to this bulletin must be held and inspected/repaired per the service procedure of this bulletin before customers
take possession of these vehicles. Involved vehicles must be held and not delivered to customers, dealer-traded,
released to auction, used for demonstration, or any other purpose.

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Service Update
N232414770 Incorrect HVAC Coolant Sensor Harness
All GM Certified Used vehicles currently in the dealers’ inventory within the Certified Pre-Owned Inventory System
(CPOIS) will be de-certified and must be held and remedied per the service procedure in this bulletin. Upon submitting
an accepted/paid warranty transaction in the Global Warranty Management (GWM) system, the vehicle can be re-certified
for sale within the CPOIS system, or once again be used in the CTP program.
Dealer Reports – For USA & Export
The Inventory tab of the Open Vehicle Report will contain Service Update Bulletin VINs that apply to this field action.
This information is intended to assist dealers with the PROMPT COMPLETION of these vehicles. The Customer InService tab will not contain Service Update Bulletin VIN data because the intent of a Service Update Bulletin is to not
inconvenience a customer with a special trip for service. Service Update Bulletins are to be completed when the
customer is in for a regularly scheduled visit.

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 tools, equipment, 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 dealer for information on whether your
vehicle may benefit from the information.

We Support
Voluntary Technician
Certification

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