GLOBAL SAFETY FIELD INVESTIGATIONS
DCS6739
URGENT - DISTRIBUTE IMMEDIATELY
Date:

December 13, 2023

Subject: N232427150 - Special Coverage
Diesel Particulate Filter Fuel Injector
Models: 2018-2021 Chevrolet 6500XD Low Cab Forward (LCF)

To:

All General Motors Medium Duty Dealers

General Motors is releasing Special Coverage N232427150 today. The total
number of U.S. vehicles involved is approximately 387. Please see the
attached bulletin for details.
Customer Letter Mailing
The customer letter mailing will begin on December 26, 2023.
Global Warranty Management (GWM)
The Applicable Warranties section on the Investigate Vehicle History (IVH) screen will
be updated December 13, 2023. A Stock VIN list is not included as our records show
there are no vehicles in dealer new inventory.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS

Special Coverage
N232427150 Diesel Particulate Filter Fuel Injector
Release Date:
Attention:

December 2023

Revision:

00

ONLY Chevrolet Medium Duty dealers can complete this field action repair.
This Special Coverage can be seen in the Applicable Warranties section in Investigate Vehicle History
(IVH).

Make
Chevrolet

Model
6500XD Low Cab Forward
(LCF)

Model Year
From
To
2018

RPO

Description

2021

Involved vehicles are identified on the Applicable Warranties section 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

Special
Coverage

On certain 2018-2021 model year Chevrolet 6500XD LCF vehicles, the diesel particulate filter (DPF)
fuel injector may fail, setting Diagnostic Trouble Code (DTC) P0420 in the Engine Control Module
(ECM). If this occurs, the Malfunction Indicator Lamp (Check Engine Light) will illuminate.
This special coverage covers the condition described above for a period of 10 years or 150,000 miles
(241,000km), whichever occurs first, from the date the vehicle was originally placed in service, regardless
of ownership.
For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after
December 13, 2023, are covered by this special coverage and must be submitted using the labor
operation codes provided with this bulletin. Claims with repair orders prior to December 13, 2023, must
be submitted to the Service Contract provider.

Correction

Vehicle owners or lessees who paid for repairs referenced in this Special Coverage (“Customers”) are
eligible for reimbursement of their reasonable and customary expenses in accordance with the
procedures specified below. The conditional right to reimbursement is provided by GM solely in the
interest of customer satisfaction and is personal to Customers. Customers may not assign and GM
does not consent to any assignment of any Customer’s right to submit reimbursement claims, or to
receive reimbursement, or any other rights granted by this Special Coverage to any third party,
including but not limited to service contract providers, and this Special Coverage is not intended to and
does not confer any third party beneficiary, subrogation or contribution rights, or any other rights to
reimbursement, against GM, whether in law, equity or otherwise, on any third parties.
If the DPF injector is determined to have failed, dealers are to replace the DPF fuel injector. The repairs
will be made at no charge to the customer.

Parts
Quantity
1

Part Name

Part No.
98254506

DPF Fuel Injector

This Bulletin is only for Medium Duty Truck vehicles and it is estimated that there are only 387 involved vehicles that will
require parts being replaced. Due to the small number of vehicles anticipated that will need this repair 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
9900871
9900872

9900873

9900874

Description
Diagnosis Only – No Further Action Required
Diesel Particulate Filter Fuel Injector Replacement
Add: Diagnosis time
Add: Download Health Report
Customer Reimbursement Approved
- For USA and Canada dealers only
- For Export dealers only
Customer Reimbursement Denied – For USA dealers only

Copyright 2023 General Motors. All Rights Reserved.

Labor
Time
0.3-1.0
0.9
0.3-1.0
0.2
N/A
0.2
N/A

Trans.
Type
ZREG
ZREG

Net
Item
N/A
N/A

ZREG

*

ZREG

**

Page 1 of 4

Special Coverage
N232427150 Diesel Particulate Filter Fuel Injector
*

For USA and Canada: Submit the dollar amount reimbursed to the Customer in Net/Reimbursement. Submit $20.00
USD ($25.00 CAD) administrative allowance in Net/Admin Allowance.
For Export: Submit the dollar amount reimbursed to the Customer in Net/Reimbursement.

**

Submit $10.00 administrative allowance in Net/Admin Allowance.

Service Procedure
1.

2.

Using GDS2, scan the ECM for DTCs.
•

If DTC P0420 is present proceed to step 2.

•

If DTC P0420 is not present, no further action is required

If DTC P0420 is present, diagnose the trouble code per SI.
•

If the Diesel Particulate Filter Injector is determined to have failed, download the Health Report and
replace the DPI injector. Refer to Diesel Particulate Filter (DPF) Fuel Injector Replacement in SI.

•

If DTC P0420 is not present, or diagnosis determines the Diesel Particulate Filter Fuel Injector is not the
root cause of the trouble, no further action is required. You may claim diagnosis time under this field
action, but any further diagnosis or repair must be customer pay or good will/special policy adjustment.

Customer Notification
General Motors will notify Customers of this special coverage on their vehicle (see copy of typical Customer letter included
with this bulletin).
Customer Reimbursement
Customer requests for reimbursement of previously paid repairs to correct the condition described in this bulletin are to
be submitted to the dealer prior to or by December 31, 2024. See General Motors Service Policies and Procedures
Manual, Product Field Action Customer Reimbursement Procedure (USA & Canada) or local Policies and Procedures,
for details.

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

Page 2 of 4

Special Coverage
N232427150 Diesel Particulate Filter Fuel Injector
December 2023
This notice applies to your vehicle, VIN: _____________________________________
Dear General Motors Customer:
As the owner of a 2018-2021 model year Chevrolet 6500XD Low Cab Forward (LCF), your satisfaction with our product
is very important to us.
This letter is intended to make you aware that some 2018-2021 model year Chevrolet 6500XD Low Cab Forward (LCF)
vehicles, may have a condition where the diesel particulate filter (DPF) fuel injector may fail, setting Diagnostic Trouble
Code (DTC) P0420 in the Engine Control Module (ECM). If this occurs, the Malfunction Indicator Lamp (Check Engine
Light) will illuminate.
Do not take your vehicle to your GM dealer as a result of this letter unless you believe that your vehicle has the
condition as described above.
What We Have Done: General Motors is providing owners with additional protection for the condition described above.
If this condition occurs on your 2018-2021 model year Chevrolet 6500XD Low Cab Forward (LCF) within 10 years of the
date your vehicle was originally placed in service or 150,000 miles (241,000km), whichever occurs first, the condition
will be repaired for you at no charge. Diagnosis or repair for conditions other than the condition described above is not
covered under this special coverage program. For customer’s vehicles already outside of the above years and/or miles,
we are still offering reimbursement if the issue occurred within the years and miles stated above. Please follow the
reimbursement steps below.
What You Should Do: If you believe that your vehicle has the condition described above, repairs and adjustments
qualifying under this special coverage must be performed by a General Motors dealer. You may want to contact
your GM dealer to find out how long they will need to have your vehicle so that you may schedule the appointment at a
time that is convenient for you. This will also allow your dealer to order parts if they are not already in stock. Keep this
letter with your other important glove box literature for future reference.
When scheduling your appointment, confirm with the dealer that they service Medium Duty Trucks.
Reimbursement: If you already paid for repairs for the condition described in this letter, and those repairs were
completed prior to this mailing, please complete the enclosed reimbursement form and present it to your dealer with
all required documents. Working with your dealer will expedite your request, however, if this is not convenient, you may
mail the completed reimbursement form and all required documents to Reimbursement Department, PO Box 33170,
Detroit, MI 48232-5170. The completed form and required documents must be presented to your dealer or received by
the Reimbursement Department by December 31, 2024, unless state law specifies a longer reimbursement period.
The right to submit reimbursement claims is provided by GM solely in the interest of customer satisfaction and is
personal to vehicle owners and lessees who previously paid for repairs referenced in this Special Coverage
(“Customers”). Customers may not assign and GM does not consent to any assignment of any Customer’s right
to submit reimbursement claims, or to receive reimbursement, or any other rights granted by this Special
Coverage to any third party, including but not limited to service contract providers, and this Special Coverage
is not intended to and does not confer any third party beneficiary, subrogation or contribution rights, or any
other rights to reimbursement, against GM, whether in law, equity or otherwise, on any third parties.
If you have any questions or need any assistance, please contact your dealer or the appropriate Customer Assistance
Center at the number listed below.
For the hearing or speech impaired, please contact our Customer Assistance Center using the Telecommunication
Relay Service by dialing 711 then providing the appropriate Customer Assistance Center number for your vehicle.
Division
Chevrolet
Puerto Rico – English
Puerto Rico – Español
Virgin Islands

Number
1-800-222-1020
1-866-467-9700
1-866-467-9700
1-866-467-9700

Text Telephones (TTY)
711 / 1-800-833-2438

We are sorry for any inconvenience you may experience; however, we have taken this action in the interest of your
continued satisfaction with our products.

Page 3 of 4

Special Coverage
N232427150 Diesel Particulate Filter Fuel Injector
Neelie O’Connor
Global Executive Director
Customer Experience Operations
Enclosure
N232427150

Page 4 of 4