NHTSA ID Number: 11033723
Manufacturer Communication Number: PIP6032C
TSB/Document Date: 2026-06-08
Summary
PIP6032B provides diagnostic direction for dealers when encountering transmission leaks
Bulletin No.: PIP6032C
Service Bulletin
Date: June, 2026
PRELIMINARY INFORMATION
Subject:
Brand:
CVT Transmission Leaks from the Oil Filter Housing and/or the Cooler Lines
Model:
Model Year:
from
VIN:
to
from
Engine:
to
Encore GX
2020 - 2027
All
All
All
MRG
Equinox
2025 - 2027
All
All
All
MRQ
Malibu
2019 - 2025
All
All
All
MRG
Trailblazer
2021 - 2027
All
All
All
MRG
Terrain
2025 - 2027
All
All
All
MRQ
Involved Region or Country
North America
Condition
Transmission may have a leak from the oil filter housing and/or the cooler lines.
Cause
Rolled O-ring on the oil filter housing and/or damaged or missing cooler line O ring.
Correction
Some Customers may bring the vehicle in with a transmission fluid leak.
This may be caused by one of two conditions.
Condition 1
Upon inspection the technician may find a leak coming from the top of the transmission.
This may be caused by a rolled or damaged oil filter housing O ring.
Leak on top of the transmission.
Copyright 2026 General Motors
. All Rights Reserved.
Page 2
June, 2026
Bulletin No.: PIP6032C
6750284
Damaged/Rolled Oil Filter O Ring.
6750285
These Seals should always be lubricated prior to installation.
Failure to do so can cause the O Ring to twist and roll or become distorted.
If this concern is found please replace the oil filter housing and take care to lubricate the O ring Prior to installation.
Condition 2
Upon Inspection the Technician may find a leak coming from the front or side of the transmission.
Bulletin No.: PIP6032C
June, 2026
Page 3
If this is found first verify the leak is not coming from the intermediate speed sensor.
Note: Most of the time these leaks are contained within the connector and it may be necessary to remove the
connector and inspect the inside for a leak using a paper towel.
If no leak is seen from the Intermediate Speed Sensor then inspect the oil cooler line inlet ports for leaks.
If no leak is seen from the Intermediate Speed Sensor then inspect the oil cooler line inlet ports for leaks.
There have been cases seen where Technicians or assembly plant issues can leave these seals off.
Take care when removing the lines from the transmission to verify the seals are on the line.
These seals resemble A/C Line seals as they are metal with a rubber sealing surface internal.
An example of these seals is seen below Item 3 is the seal.
6782715
Page 4
June, 2026
Bulletin No.: PIP6032C
6782717
There are secondary shipping seals installed in the cooler line ports on the transmission from the supplier.
The seals are pierced when the cooler lines are installed, and will contain the majority of the leak .
These Seals WILL remain in the transmission and no attempt should be made to remove them as seen in the picture
below .
6750295
If a leak is found in this location replace the damaged or missing seals, drive the vehicle and verify there are no
leaks.
On vehicles equipped with a stack plate heat exchanger there are O-rings between the transmission case and the
heat exchanger.
Bulletin No.: PIP6032C
June, 2026
Page 5
These O-rings are generally the source of the leak and the stack plate heat exchanger will need to be removed to
replace the seals, in most cases the heat exchanger does NOT need to be replaced.
In some rare instances there may be a leak in a similar location caused by the transmission oil pressure ports or
case porosity.
This should only be considered after the above leaks have been verified and found not to be the source of the leak.
The above leaks have caused misdiagnosis of case damage or porosity leading to unnecessary transmission
replacement.
Version
4
Modified
12/11/2024 - Created on.
01/27/2025 - Updated Model years and Models affected
06/18/2025 - Updated Model years and Models affected
06/03/2026 - Updated Model years
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.
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TSB/Document ID: PIP6032C
Replacement Service Bulletin Number:
MFR Communication Date: 2026-06-03
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: UNKNOWN OR OTHER
MFR Component System:
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