18-NA-361

Bulletin No.:
Service Bulletin
Date:
18-NA-361
December, 2022
TECHNICAL
Subject:
Diagnostic Tip for Diesel Fuel System Contamination, No Start, Malfunction Indicator
Lamp (MIL) Illuminated - DTC P0087, P026D, P0461, P0463, P0171, P0172, P0300 ,
P1029, P129F, P2A00, P2264, P228C, P228A, P228B, and/or P228D Set
Brand:
Model:
Cadillac
VIN:
from
to
Engine:
to
Escalade Models
2021
2023
3.0L Turbo
Diesel (LM2)
Cruze
2014
2015
2.0L Diesel (LUZ)
Cruze
2018
2019
Equinox
2018
2019
Silverado
2017
2018
6.6L Turbo
Diesel (L5P)
Silverado 1500 4WD (New Model,
12th VIN Digit = 7)
2019
2019
3.0L Turbo
Diesel (LM2)
Silverado 1500
2020
2021
2022
2022
Silverado 1500 LTD
(RPO J21, VIN Digit
5 = W / Y)
Chevrolet
Model Year:
from
Silverado 1500 New
(RPO J22, VIN Digit
5 = A / D)
Silverado 1500
1.6L Diesel (LH7)
3.0L Turbo
Diesel (LM2)
—
2023
—
—
2023
3.0L Diesel (LZ0)
Silverado 2500/3500
2019
2023
6.6L V-8 Duramax
Turbo
Diesel (L5P)
Silverado 4500HD,
5500HD and
6500HD
2019
2023
6.6L V-8 Duramax
Turbo
Diesel (L5D)
Silverado LD
2019
2019
6.6L V-8 Duramax
Turbo
Diesel (L5P)
Suburban
2021
2023
3.0L Turbo
Diesel (LM2)
Tahoe
2020
2023
3.0L Turbo
Diesel (LM2)
Copyright 2022 General Motors LLC. All Rights Reserved.
Transmission:
Page 2
Brand:
December, 2022
Model:
from
to
Sierra
2017
2018
Sierra 1500
2020
2021
2022
2022
Sierra 1500 Limited
(RPO J21, VIN Digit
5 = 8 / 9)
GMC
Model Year:
Sierra 1500 New
(RPO J22, VIN Digit
5 = H / U)
Bulletin No.: 18-NA-361
VIN:
from
to
Engine:
Transmission:
6.6L V-8 Duramax
Turbo
Diesel (L5P)
3.0L Turbo
Diesel (LM2)
—
—
—
Sierra 1500
2023
2023
3.0L Diesel (LZ0)
Sierra 2500/3500
2019
2023
6.6L V-8 Duramax
Turbo
Diesel (L5P)
Terrain
2018
2019
1.6L Diesel (LH7)
Yukon
2021
2023
3.0L Turbo
Diesel (LM2)
Bulletin No.: 18-NA-361
Involved Region or Country
December, 2022
Page 3
North America, Israel
Some customers may comment on one or more of the following conditions:
• MIL is illuminated
• No start
Condition
5168457
Note: If removing the fuel filter from the filter housing, clean the outside of the fuel filter
assembly prior to removing the fuel/water filter from the housing.
Some technicians may find metal particles in the fuel system during diagnostics.
Important: If the fuel/water filter has been removed for inspection, Do Not install the
filter back into the housing until the fuel/water separator reservoir has been cleaned.
Refer to the Information on Fuel/Water Filter Removal section below.
Some technicians may also find one or more of the following DTCs set in the Engine
Control Module (ECM):
• P0087: : Fuel Rail Low Pressure
• P0171: Fuel System Lean
• P0172: Fuel System Rich
• P026D: Injection Quantity Too High
• P0300: Engine Misfire Detected
• P0461: Fuel Level Sensor Performance
• P0463: Fuel Level Sensor Circuit High Voltage
• P1029: Fuel Pump Motor Phase U-V-W Circuits
• P129F: Fuel Pump Power Control Module Fuel Pump Speed Signal Incorrect
• P2264: Water in Fuel Sensor Circuit
• P228A: : Fuel Pressure Regulator 1 Control - Forced Engine Shutdow
• P228B: : Fuel Pressure Regulator 2 Control - Forced Engine Shutdow
• P228C: : Fuel Pressure Regulator 1 Control Performance - Low Pressure
• P228D: : Fuel Pressure Regulator 1 Control Performance - High Pressure
• P2A00: HO2S Performance Sensor 1
Page 4
Correction
December, 2022
Bulletin No.: 18-NA-361
If you encounter such a situation, DO NOT replace the fuel system as described in
Service Bulletin #16-NA-102.
Please perform the following fuel system flushing procedure prior to performing further
diagnostics.
Once the fuel system has been flushed, continue with diagnostics as described in SI.
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.
Vehicles that have been Mis-filled
All Fuel must meet ASTM D975 diesel fuel standards.
Renewable or BioMass fuels have an API of up to 50.
The API can be between 40 and 50, depending on if the
fuel is a combination of #1, #2, and the RD fuel. Most all
of this fuel is clear in color when not mixed with other
fuels.
The use of renewable Diesel (R-99, RD100, R-95) has
been approved by GM Engineering for all GM vehicles
with Diesel Engines.
Information on Fuel/Water Filter
Removal
Note: Mis-fuelling or the presents of contamination in
the fuel is not a product issue and should not be
charged to warranty,
By analyzing warranty return parts, GM engineering
has found that many fuel pumps and fuel injection
system component failures showed evidence of DEF
contamination in the fuel. Just recently, SI
Contaminants-in-Fuel Diagnosis has been updated with
an accurate test for determining if DEF can be found in
the fuel system. This adds to our toolbox used for
evaluating diesel fuel.
Here are some of the tools to help determine if a
vehicle has contaminated fuel:
1. Test for the presents of DEF in the fuel. Refer to
Contaminants-in-Fuel Diagnosis in SI.
2. Test the Specific Gravity (API) of the fuel. Refer to
Fuel Specific Gravity Testing in SI.
3. Place a fuel sample in a clear container. Look at
the color of the fuel compared to what you normally
see in your region. Cloudy looking fuel is an
indication that there may be an issue with the fuel.
4. Look for any separation of the fuel. This can be
anything from sediment settling or different layers
like water or DEF being seen.
5. Put a sample of the fuel into a Styrofoam cup, and
place the cup in a drain pan, fuel contaminated
with gasoline will certainly melt the cup within half
an hour. B20 Biodiesel will also melt a Styrofoam
cup but will take about an hour.
5417311
R-99 or R-95 Diesel Fuel
Renewable diesel (RD) is essentially any diesel fuel
produced from a renewable feedstock that is
predominantly hydrocarbon (not oxygenates). RD
meets the requirements for use in a diesel engine.
B20 (Biodiesel) fuel is a blend of up to 20-percent bio
components and 80-percent conventional diesel. This
helps lower carbon dioxide emissions and lessens
dependence on petroleum.
Water or other like contaminates in the fuel will create
driveability concerns and loss of engine power. If water
and/or debris is present in the fuel system, the fuel
cannot cool and lubricate the components properly,
causing overheating, rust and corrosion. This can result
in component failure. Water and debris can enter the
fuel system in several ways, either through a
contaminated refueling source, plugged venting or
through long term condensation in the vehicle fuel
tanks.
Bulletin No.: 18-NA-361
December, 2022
5417281
1. Remove the fuel/water filter from the housing using
care not to separate the filter from the fuel/water
separator reservoir.
Page 5
5417298
2. Using care, separate the filter from the fuel/water
separator reservoir by placing the filter downwards
in a clean/dry drain pan.
Page 6
December, 2022
Bulletin No.: 18-NA-361
Fuel System Flushing Procedure
Note: Performing the test may aid in determining the
source and section of the fuel system causing the
contamination.
1. If removed, re-install the fuel filter.
5167517
5417283
– If the filter is facing upwards, debris left on the
sides of the filter may escape past the O-ring
seal during removal and settle in the fuel/water
separator reservoir.
– Water and/or debris left in the fuel/water
separator reservoir will flow past the filter, directly
into the fuel system when re-started.
– Debris that is allowed past the filter and into the
fuel system can cause fuel injection issues that
may set DTCs P2A00, P026D, P0300, P0172.
Replacement of fuel injectors without a complete
cleaning of the fuel system will only be a
temporary fix until the debris gets into the new
injectors.
3. Inspect the fuel/water separator reservoir and filter
for heavy debris.
• If heavy debris is found in the filter, clean the
fuel/water separator reservoir and continue to
the Fuel System Flushing Procedure below.
• If no signs of debris are found, clean the fuel/
water separator reservoir, install a new filter and
refer to SI for further diagnostics.
2. Disconnect the chassis side fuel feed hose (3) from
the engine side fuel feed pipe (4).
3. Place the end of the chassis side fuel feed hose
into a clean container and run the fuel pump to
clean any debris left in the fuel lines, approximately
2-3 gallons (7.6-11.4L).
4. Clean the fuel/water separator reservoir.
5. Install a new fuel filter.
6. Disconnect the chassis side fuel return hose (2)
from the engine side return pipe (1).
Note: The white “Tubing” shown in the graphics below
depict the route of the clear line, not the length.
5168476
Bulletin No.: 18-NA-361
December, 2022
7. Install a clear line between the fuel supply hose
and the fuel return hose.
8. Run the fuel pump until the fuel runs clear in
the line.
Page 7
9. Connect the fuel supply hose to the engine
supply pipe.
10. Install a clear line in series at the fuel return hose
to the engine return pipe.
11. Run the fuel pump until the fuel runs clear in
the line.
Reconnect all fuel lines and retest for any codes or
symptoms in the vehicle.
Parts Information
No parts are required for this repair.
5168447
Version
12
Modified
Released December 10, 2018
Revised June 24, 2019 – Added 2020 to Model Year.
Revised August 14, 2019 – Added 2019 and 2020 Silverado HD Models.
Revised October 03, 2019 – Added Information on Fuel/Water Filter Removal section.
Revised October 14, 2019 – Removed LCF and added 2020 Silverado/Sierra 1500
with LM2.
Revised September 09, 2020 – Added DTCs to the Subject, Condition and Information on
Fuel/Water Filter Removal sections.
Revised October 20, 2020 – Added the 2021 Model Year to Silverado and Sierra Models
and additional engine descriptions.
Revised May 06, 2021 - Add Note to Condition section to clean the Filter Housing
Assembly.
Revised January 10, 2022 - Added 2022 to Model Year.
Revised September 06, 2022 - Added 2023 to Model Year.
Revised November 07, 2022 - Update P-codes in Condition section, and Added Vehicles
that have been Mis-filled and R-99 or R-95 Diesel Fuel sections.
Revised November 29, 2022 - Added P2264 to Subject and Condition 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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