22-NA-240
Service Bulletin Details
Public Details for: 22-NA-240
This informational bulletin advises the tech to validate if oil is leaking into the cooling system and to test and verify were to leak is coming from before replacing all the parts that wouldn't apply to the repair.
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Bulletin No.: Service Bulletin Date: 22-NA-240 December, 2022 INFORMATION Subject: Information on Overheating, Cooling System Contaminated with Engine Oil This bulletin replaces PIP5257E. Please discard PIP5257E. Brand: Buick Cadillac Chevrolet GMC Model: Model Year: VIN: from to Engine: from to Enclave 2010 2023 LFY, LLT LaCrosse 2010 2019 LF1, LFW, LFX, LGX ATS 2013 2019 LF4, LFX, LGX CT4 2022 2023 LF4 CT5 2020 2023 LGY CT6 2016 2020 LGW, LGX CTS 2010 2019 LFW, LF3, LFX, LGX SRX 2010 2016 LFX, LFW XT5 2017 2023 LGX XT6 2020 2023 LGX — — Blazer 2019 2023 Camaro 2010 2023 LFX, LGX Caprice 2012 2017 LFX LGX Captiva 2011 2018 LFX, LFW Colorado 2015 2022 LFX, LGZ Equinox 2010 2017 LF1, LFW, LFX Impala 2012 2020 LFX Traverse 2010 2023 LFY, LLT Acadia 2010 2021 LGX, LLT Canyon 2015 2022 LFX, LGZ Terrain 2010 2017 LF1, LFW, LFX Copyright 2022 General Motors LLC. All Rights Reserved. Transmission: — Page 2 December, 2022 Bulletin No.: 22-NA-240 Involved Region or Country North America, Brazil, Chile, Colombia, Ecuador, Paraguay, Uruguay, Venezuela, Europe, Russia, Middle East, Iraq, Japan, Cadillac Korea (South Korea), China, Taiwan, Singapore, Australia/New Zealand, Other Africa Condition Some customers may comment on one or more of the following conditions: • Overheating • Coolant overflowing from reservoir • Oil contamination in coolant Cause This condition may be caused by engine oil mixing into the coolant from the main oil gallery to a water jacket through block porosity or thin wall-casting or from the oil cooler into the radiator. ⇒ The average oil pressure is over 414 kPa (60 psi) and the coolant pressure is 110 kPa (16 psi). If you encounter a vehicle with this concern, validation on where the oil contamination is emitting from is required before replacing components: Information ⇒ If equipped, test the oil cooler system for possible leaking into the coolant through the radiator. – If the oil cooler tests good or the vehicle is Not equipped with an oil cooler, then reference this bulletin and replace the engine as well as all the rubber coolant hoses. Flush the radiator and heater core if possible or replace hoses as needed. Also if equipped, flush the rear heater core and replace hoses as needed. Version 1 Modified Released December 01, 2022 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