18-NA-103
Service Bulletin Details
Public Details for: 18-NA-103
This service bulletin provides service information for customer concerns of an in-tank fuel pump whining noise, engine hard to start and/or stalls and malfunction indicator lamp (mil) is illuminated that may be caused by gelling of fuel in
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Bulletin No.: Service Bulletin Date: 18-NA-103 August, 2023 INFORMATION Subject: Brand: Information on Diesel Fuel Gelling in Cold Temperatures Causing In-Tank Fuel Pump Whine and Driveability Concerns Model: Model Year: VIN: from to GM Passenger Cars and Trucks (Excludes Chevrolet Low Cab Forward Medium Duty Trucks) 2015 2024 Chevrolet Silverado 2500/3500 2017 2024 GMC Sierra 2500/3500 2017 2024 from to — — Engine: Transmission: Any Diesel — Involved Region or Country North America Condition Some customers may comment that the in-tank fuel pump is whining, the engine is hard to start and/or stalls and the Malfunction Indicator Lamp (MIL) is illuminated. Cause Some diesel fuels may have blends that are incompatible with cold ambient temperatures causing the diesel fuel to gel and/or develop solids that may block the in-tank fuel pump pickup. Technicians may observe on a scan tool one or more of the following DTCs set in the K20 Engine Control Module: • DTC P0087 Fuel Rail Low Pressure • DTC P018B Fuel Pressure Sensor Performance • DTC P228A Fuel Pressure Regulator 1 Control - Forced Engine Shutdown • DTC P228B Fuel Pressure Regulator 2 Control - Forced Engine Shutdown • DTC P2635 Fuel Pump Flow Performance Correction Bring the vehicle inside to allow the diesel fuel to warm up to more than 0°C (32°F). Confirm the engine will start and the whining noise from the fuel pump is gone. 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. Service Recommendation Fuel Waxing/Icing Fuel distributors blend #1 and #2 diesel fuels for seasonal requirements in a particular region. In Canada, diesel fuel blend #1 is categorized as type A (Winter) and diesel fuel blend #2 is categorized as type B (Summer). No other blending of fuels is recommended. However, a customer may desire to use a winter fuel additive to prevent fuel waxing or icing Copyright 2023 General Motors LLC. All Rights Reserved. during extreme cold snaps. If a winter fuel additive is to be used, it must not contain any metal based additives, alcohol or other water emulsifiers that may compromise the water removal effectiveness of the fuel filtering system. 1. Bring the vehicle inside to allow the diesel fuel to warm up to more than 0°C (32°F). Confirm the engine will start and the whining noise from the fuel pump is gone. This may take as little as one to two hours. Fuel temperature sensor data can be monitored with the scan tool. Once the engine can be started and is running, the warm return fuel will further aid in thawing the tank. When the fuel has thawed it is suggested to drain the water separator at the bottom of the fuel filter to ensure any water is removed. Page 2 August, 2023 Bulletin No.: 18-NA-103 2. DO NOT replace the in-tank fuel pump for this concern. If the fuel pump whine noise is gone after warming the fuel, the fuel blend that was used is most likely incompatible with the climate conditions. Purchasing fuel from a high-volume fuel retailer increases the chance that the fuel is fresh and of good quality. Parts Information No parts are required for this repair. Warranty Information Note: This Condition should not be considered a vehicle problem but an issue with the local fuel blend. Do not submit a warranty claim for this procedure. Version Information Version 8 Modified Released April 5, 2018 Revised July 25, 2018 – Added the 2019 Model Year. Revised June 24, 2019 – Added Model Year 2020 vehicles and removed the Supersede stating: This Bulletin replaces PIP5543. Revised October 23, 2020 – Added the 2021 Model Year. Revised January 19, 2022 – Added the 2022 Model Year and exclusion statement to Models section. Revised September 14, 2022 – Added the 2023 Model Year and an Important Statement. Revised March 17, 2023 – Added the 2024 Model Year to Silverado/Sierra 2500/3500 models. Revised August 01, 2023 – Added the 2024 Model Year to the Silverado/Sierra Light Duty models. 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. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION