NHTSA ID Number: 10143762
Manufacturer Communication Number: PIP5257B
TSB/Document Date: 2018-08-20
Summary
This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have oil mixed in with the engine coolant. Technician will need to inspect the oil cooler if equipped for possible leaking into the cooling system through the radiator. If no issue found replace the engine as well as all rubber coolant hoses.
Bulletin No.: PIP5257B
Published date: 07/12/2018
Preliminary Information
PIP5257B Cooling System Contaminated With Engine Oil
Models
Brand:
Model:
Model Years:
VIN:
from
to
Engine:
Transmissions:
Enclave
2010 - 2019
All
All
3.6 LFY, LLT
All
LaCrosse
2010 - 2016
All
All
3.0 LF1, LFW, 3.6 LFX, LLT
All
Allure
2010 - 2016
All
All
3.0 LF1, LFW, 3.6 LFX, LLT
All
CTS
2010 - 2015
All
All
3.0 LFW, 3.6 LFX, LLT
All
SRX
2010 - 2016
All
All
3.6 LFX, LLT
All
ATS
2013 - 2015
All
All
3.6 LFX
All
XTS
2013 - 2019
All
All
3.6 LFX
All
Camaro
2010 - 2015
All
All
3.6 LFX, LLT
All
Captiva Sport
2011 - 2015
All
All
3.0 LFW, 3.6 LFX
All
Colorado
2015 - 2016
All
All
3.6 LFX
All
Equinox
2010 - 2018
All
All
3.0 LF1, LFW, 3.6 LLT, LFX
All
Impala
2012 - 2019
All
All
3.6 LFX
All
Traverse
2010 - 2019
All
All
3.6 LFY, LLT
All
Acadia
2010 - 2016
All
All
3.6 LLT
All
Canyon
2015 - 2016
All
All
3.6 LFX
All
Terrain
2010 - 2016
All
All
3.0 LF1, LFW, 3.6 LLT, LFX
All
Supersession Statement
This PI was superseded to update model years. Please discard PIP5257A.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition / Concern
A vehicle may be brought in for oil in the cooling system, Oil in the coolant overflow
reservoir, or overheat due to coolant blown out of coolant reservoir.
You will normally find a very thick oil in coolant mix in the radiator and coolant overflow
reservoir.
This condition is caused by a leakage from the main oil gallery to a water jacket through
block porosity or thin wall casting.
The average oil pressure is over 60 psi and the coolant pressure is 16 psi.
Recommendations / Instructions
If you encounter a vehicle with this concern,
First, 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 PI and replace the engine as well as all rubber coolant hoses.
Flush the radiator and heater core if possible or replace those as needed.
Warranty Information
For vehicles repaired under warranty use:
Labor Operation
4067490
Description
Engine Replacement
Labor Time
Use Published Labor
Operation Time
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is
resolved without completing every step, the remaining steps do not need to be performed.
© 2018 General Motors
. All Rights Reserved.
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TSB/Document ID: PIP5257B
Replacement Service Bulletin Number:
MFR Communication Date: 2018-07-12
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING
MFR Component System:
MFR Component Subsystem:
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