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NHTSA ID Number: 10222656
Manufacturer Communication Number: 18-NA-098
Summary
This informational bulletin provides information for the technicians on where to look on the Duramax engine for coolant leaks.
Condition
Some customers may comment on a coolant leak, coolant consumption and/or low coolant message being displayed on the driver information center (DIC).
Correction
Use the illustrations below, that show the areas in blue, to help identify where to look for possible coolant leak paths for the Duramax engine.
39 Affected Products
Vehicles
MAKE | MODEL | YEAR |
CHEVROLET | SILVERADO 1500 | 2017-2018 |
CHEVROLET | SILVERADO 2500 | 2019-2023 |
CHEVROLET | SILVERADO 3500 | 2019-2023 |
CHEVROLET | SILVERADO 4500HD | 2019-2023 |
CHEVROLET | SILVERADO 5500HD | 2019-2023 |
CHEVROLET | SILVERADO 6500HD | 2019-2023 |
GMC | SIERRA 1500 | 2017-2018 |
GMC | SIERRA 2500 | 2019-2023 |
GMC | SIERRA 3500 | 2019-2023 |
1 Associated Document
Manufacturer Communications
Bulletin No.: 18-NA-098
Date: September, 2022
https://www.nhtsa.gov/recalls?nhtsaId=10222656
MC-10222656-0001.pdf 636.534KB
NHTSA ID Number: 10163225
Manufacturer Communication Number: 18NA098
Summary
This informational bulletin provides information for the technicians on where to look on the Duramax engine for coolant leaks.
1 Associated Document
Manufacturer Communications
Bulletin No.: 18-NA-098
Date: June, 2019
https://www.nhtsa.gov/recalls?nhtsaId=10163225
MC-10163225-9999.pdf 1250.343KB
“This site contains affiliate links for which OEMDTC may be compensated” |
- UNSURPASSED FREEZE PROTECTION AND ANTI-BOIL PERFORMANCE outperforms industry standards
- ORGANIC ACID TECHNOLOGY RESISTS RUST, SCALE & CORROSION while protecting all cooling system metals (including aluminum)
- HIGH-QUALITY ADDITIVES PROTECT AGAINST LEAKS and won’t harm gaskets, hoses, plastics or original vehicle finish
- ORANGE CONCENTRATE FORMULA should be mixed with clean tap water or demineralized water at 50/50 ratio for temperatures -34 to 265F; 60/40 for -62 to 270F; and 70/30 for -84 to 267F
- VERSATILE ENGINE COOLANT: This antifreeze + coolant is designed for use in all GM vehicles 1995 and newer requiring an orange organic acid technology (OAT) coolant. This item contains a bittering agent called Denatonium Benzoate.
- PROTECTS ENGINE: This antifreeze + coolant provides protection against rust and corrosion for all cooling system metals, including aluminum
- LONG-LASTING COOLANT: This antifreeze + coolant has a service life of up to 5 years/150,000 miles with a complete cooling system flush and fill
- BETTER FORMULA: Our antifreeze coolant solution is free of amines, phosphate, borate, nitrite and silicate
- EXCELLENT PERFORMANCE: This meets the performance requirements of ASTM D3306, D4985 and GMW3420, GM6277M
- ACDelco 10-101 DEX COOL (ORANGE)
- Contains A Bittering Agent
- OEM
- ZEREX DEX-COOL antifreeze coolant is approved by General Motors to the GM 6277M specification
- ZEREX DEX-COOL antifreeze coolant contains no phosphates, silicates, borates, nitrates, amines and nitrites
- Valvoline ZEREX DEX-COOL antifreeze coolant is a patented carboxylate formulation with a service life of up to five years or 150,000 miles
- When diluted 50percent with water, ZEREX DEX-COOL protects modern engine components from winter freezing and summer boiling
- For any product use or product technical questions call 1-800-TEAM-VAL
- ZEREX DEX-COOL antifreeze coolant is approved to the GM 6277M specification
- ZEREX DEX-COOL antifreeze coolant contains no phosphates, silicates, borates, nitrates, amines and nitrites
- Valvoline ZEREX DEX-COOL antifreeze coolant is a patented* carboxylate formulation with a service life of up to five years or 150,000 miles
- When diluted 50% with water, ZEREX DEX-COOL protects modern engine components from winter freezing and summer boiling
- For any product use or product technical questions call 1-800-TEAM-VAL
- ZEREX DEX-COOL antifreeze coolant is approved by General Motors to the GM 6277M specification
- ZEREX DEX-COOL antifreeze coolant contains no phosphates, silicates, borates, nitrates, amines and nitrites
- Valvoline ZEREX DEX-COOL antifreeze coolant is a patented* carboxylate formulation with a service life of up to five years or 150,000 miles
- When diluted 50% with water, ZEREX DEX-COOL protects modern engine components from winter freezing and summer boiling
- ZEREX DEX-COOL antifreeze coolant is storage stable for up to five years as both a concentrate or diluted with water
- Recommended and formulated for use in all vehicles that require Dex-Cool coolant
- Also for use with cars and light-duty trucks with aluminum radiators using extended life coolant
- Blend of premium long-lasting inhibitors provides extended performance
- Protects against temperature extremes and the ravages of rust and corrosion
- Good for 5 years or 150,000 miles
- Contains a bittering agent
- 1 GALLON ENGINE ANTIFREEZE/COOLANT: Fully compatible with other extended life antifreeze/coolants. This item contains a bittering agent called Denatonium Benzoate.
- PROTECTS: Advanced formulation prevents rust & corrosion protecting all engine cooling system components
- DESIGNED FOR NORTH AMERICAN VEHICLES: Recommended for use with Ford, Chrysler, and GM vehicles that require an orange organic acid technology formula
- GUARANTEED: When installed as part of a complete flush and fill, PEAK guarantees this coolant will provide service life protection of up to 150,000 miles or 5 years.
- CONCENTRATED FORMULA: Ideal for flushing, filling, or topping off your cooling system
- UNSURPASSED FREEZE PROTECTION AND ANTI-BOIL PERFORMANCE outperforms industry standards
- ORGANIC ACID TECHNOLOGY RESISTS CORROSION, SCALE AND RUST while protecting all cooling system metals (including aluminum)
- HIGH-QUALITY ADDITIVES PROTECT AGAINST LEAKS and won’t harm gaskets, hoses, plastics or original vehicle finish
- PRE-MIXED ORANGE FORMULA IS READY-TO-USE in a 50/50 ratio with deionized water to protect all modern engine components from winter freezing (-34F) and summer boiling (265F).
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Copyright 2022 General Motors LLC. All Rights Reserved. Service Bulletin Bulletin No.: 18-NA-098 Date: September, 2022 INFORMATION Subject: Diagnostic Tip for Coolant Leak, Coolant Consumption and/or Low Coolant Message Being Displayed On the Driver Information Center (DIC) Brand: Model: Model Year: VIN: Engine: Transmission: from to from to Chevrolet Silverado 2017 2018 Equipped with 6.6L Diesel Engine (RPO L5P, L5D) Silverado 2500/3500 2019 2023 Silverado 4500HD, 5500HD and 6500HD 2019 2023 GMC Sierra 2017 2018 Sierra 2500/3500 2019 2023 Involved Region or Country North America, Middle East, Australia, New Zealand. Condition Some customers may comment on a coolant leak, coolant consumption and/or low coolant message being displayed on the driver information center (DIC). Correction Use the illustrations below, that show the areas in blue, to help identify where to look for possible coolant leak paths for the Duramax engine. Page 2 September, 2022 Bulletin No.: 18-NA-098 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. 5027608 1. Plugs in Cylinder Head (PLUG, CYL HD CORE HOLE) (Qty 8) 2. Block Heater (HEATER, ENG COOL) 3. Cup Plugs in Block (PLUG, ENG BLK COOL DRN HOLE (OD=40MM) (Qty 5) 5027641 1. Coolant Hose and Clamp 2. Thermostat Housing (SEAL, ENG COOL THERM (O RING) 3. O-Ring for Bypass Pipe (SEAL, THERM BYPASS PIPE (O RING)) 4. Flange with Gasket for Bypass Pipe (GASKET, THERM BYPASS PIPE) 5. O-Ring Seal (Front Cover to Water Pump) (SEAL, W/PMP CVR) 6. Seal-Water Pump to Pipe (GASKET, W/PMP OTLT PIPE) 7. Coolant Hose and Clamp 8. Cup Plug on Block (PLUG, ENG BLK COOL DRN HOLE) Bulletin No.: 18-NA-098 September, 2022 Page 3 5028324 1. O-Ring (Water Pipe to Oil Cooler) (SEAL, W/PMP OTLT PORT) 2. Either end of the Oil Cooler Adapter (Elbow) (GASKET, ENG OIL CLR ADAP) 3. Seal in the Oil Coolet (GASKET, ENG OIL CLR) Note: Ghost view of the Oil Cooler to reveal O-ring and cover gasket and 2 adapter gaskets (Oil Filter not shown). 5028590 1. Cup Plugs (Qty 2)(One per side in rear of Cylinder Head) (PLUG, CYL HD CORE HOLE) 2. Gaskets under Flange, 1 location on EGR Bypass Valve (Serviced with VALVE, EGR VLV CLR BYPASS) 3. Hose Clamps, 5 locations 4. Turbo Coolant Feed Pipe (GASKET, TURBO COOL FEED & RTN PIPE) 5. Gaskets under Flange, 2 locations on EGR Valve (Service with VALVE, EGR) 6. Cup Plug in Bypass Valve (Service with VALVE, EGR) 7. Cover on Flywheel Housing (GASKET, FLYWHL HSG CVR) Page 4 September, 2022 Bulletin No.: 18-NA-098 5028593 1. Gasket for Turbo coolant pipes (GASKET, TURBO COOL FEED & RTN PIPE) (Qty 2) 2. Ghost view of Upper Intake Manifold and ERG Coolant Pipe. Inlet Adapter removed to reveal EGR Coolant Return Pipe. 3. Hose Clamps for Turbo Coolant Pipes and DEF Coolant Pipe (Qty6) 5028604 Note: A leak on the top of the engine will trail down the back of the engine and appear as a rear cover leak. 1. Hose Clamps on the EGR Coolant Return Hose (Qty 2) 2. O-Ring for EGR Coolant Return Pipe (SEAL, EGR COOL FEED PIPE) (Qty 2) 3. Gaskets under Flanges for EGR Coolant Feed and Return Pipes (SEAL, EGR COOL FEED PIPE) (Qty 2) 5028676 1. Gaskets between Cylinder, Heads and Water Crossover Housing (GASKET, ENG COOL THERM HSG) (Qty 2) 2. Head Gaskets (GASKET, CYL HD) Bulletin No.: 18-NA-098 September, 2022 Page 5 Version 6 Modified Released April 05, 2018 Revised July 25, 2018 – Added the 2019 to Model Year. Revised June 24, 2019 – Added the 2020 Model Year. Revised November 06, 2020 — Added 2021 Model Year and Silverado 4500HD, 5500HD and 6500HD Revised January 11, 2022 – Added 2022 to Model Year. Revised September 09, 2022 – Added 2023 to Model Year. 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
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