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NHTSA ID Number: 10144421
Manufacturer Communication Number: PIP5487C
Summary
This Preliminary Information communication advises the technician on the steps to diagnosing the concern and the repair. Customer has Warning Lamps and/Or coolant leaks present.
4 Affected Products
Vehicles
MAKE | MODEL | YEAR |
CHEVROLET | SILVERADO | 2017 |
CHEVROLET | SILVERADO 2500 | 2018 |
GMC | SIERRA | 2017 |
GMC | SIERRA 3500 | 2018 |
SEOCONTENT-START
Bulletin No.: PIP5487C
Published date: 08/1/2018
Preliminary Information
PIP5487B 6.6L L5P Duramax Coolant Leaks
Models
Brand: | Model: | Model Years: | VIN: | Engine: | Transmissions: | |
---|---|---|---|---|---|---|
from | to | |||||
Chevrolet | Silverado | 2017 – 2018 | All | All | 6.6 L5P | All |
GMC | Sierra | 2017 – 2018 | All | All | 6.6 L5P | All |
Involved Region or Country | North America |
Additional Options (RPO) | 6.6 L5P |
Condition | A customer may comment on a coolant leak, coolant consumption or of a low coolant message being displayed on the Driver’s Information Center (DIC). |
Cause | This may be due to cooling system leaks or an improper coolant fill procedure.
It may take a few engine temperature cycles (from operating temperature to cold) for the coolant level to show a lower than normal level. Be sure to complete the current SI coolant system leak checks and verify there are no external leaks. Reference the locations below to aid in locating external coolant leaks. If no external leaks are found, refill the cooling system following SI procedures for filling the cooling system. Evaluate coolant levels after a proper coolant fill is completed. |
Correction:
If the diagnosis has lead to external coolant leaks or a coolant loss concern check for leaks in the following areas:
Welded flange leaking on the Exhaust Gas Recirculation (EGR) coolant return pipe. Refer to call out #1 in the above picture.
Welded flange leaking on the Exhaust Gas Recirculation (EGR) coolant feed pipe. Refer to call out #2 in the above picture.
Another view of the leaking welded flange on the Exhaust Gas Recirculation (EGR) coolant feed pipe. Refer to call out #2 in the above picture.
Coolant leak at the O-ring seal of the Exhaust Gas Recirculation (EGR) coolant feed pipe. Refer to call out #2 in the above picture.
View of a rolled or pinched O-ring at Exhaust Gas Recirculation (EGR) coolant feed pipe. Refer to call out #2 in the above picture.
NOTE : The leak shown above could only be confirmed after removing the front accessory drive bracket and alternator.
Coolant leaking from coolant hoses at the Emission Reduction Fluid Injector (DEF Injector).
Please be aware of the following if there is a need to pressure test the cooling system:
Note: The radiator surge tank uses two different radiator surge tank caps. The radiator surge tank cap that vents pressure in the event of excessive cooling system pressure is located on the lower outboard side of the radiator surge tank (2). The radiator surge tank cap that is located on top of the radiator surge tank (1) is where the cooling system is filled and where pressure testing equipment is to be mounted.
Caution: The cap mounted to the top of the surge tank uses LEFT HAND threads. Turn the cap clockwise to remove the cap or counter clockwise to install the cap. Failure to turn the cap in the proper direction when installing or removing it may cause damage to the cap and/or the surge tank.
Refer to Cooling System Leak Testing (L5P) for more information.
Version History
Version | 3 |
Modified | Created on 03/13/2017
9/6/2017 to add 2018 model year 07/25/2018 to add 2019 Model Year 7/31/2018 to remove 2019 model year |
SEOCONTENT-END
Bulletin No.: PIP5487C
Published date: 08/1/2018
https://www.nhtsa.gov/recalls?nhtsaId=10144421
https://static.nhtsa.gov/odi/tsbs/2018/MC-10144421-9999.pdf
To View or Download this Document Click Here
Bulletin No.: PIP5487B
Published date: N/A
https://www.nhtsa.gov/recalls?nhtsaId=10143780
https://static.nhtsa.gov/odi/tsbs/2018/MC-10143780-9999.pdf
To View or Download this Document Click Here
Bulletin No.: PIP5487A
Published date: 09/6/2017
https://www.nhtsa.gov/recalls?nhtsaId=10156994
https://static.nhtsa.gov/odi/tsbs/2017/MC-10156994-9999.pdf
To View or Download this Document Click Here
“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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