24-NA-009

Bulletin No.:
Service Bulletin
24-NA-009
Date:
January, 2024
TECHNICAL
Subject:
Loss of Forward Gear, Slipping, Malfunction Indicator Lamp Illuminated - DTC
P2714 Set
This Service Bulletin replaces PIP5819B. Please discard all versions of PIP5819.
Brand:
Model:
Buick
Model Year:
VIN:
from
to
Encore GX
2020
2023
Chevrolet
Malibu
2019
2023
Chevrolet
Trailblazer
2021
2023
Involved Region or Country
from
to
All
All
Engine:
Transmission:
All
VT40 CVT
Automatic
(MRG)
North America, Israel, Middle East, GM Korea Company, China
Some customers may comment on one or more of the following conditions:
Condition
⇒ Loss of Forward Gear
⇒ Slipping
⇒ Malfunction Indicator Lamp Illuminated
Technicians may find DTC P2714 (Transmission Control Solenoid Valve 4 Stuck Off) set
in the Transmission Control Module (TCM).
Note: This condition may be intermittent or not reproduceable.
Cause
Copyright 2024 General Motors LLC. All Rights Reserved.
This condition may be caused by the clutch regulator valve sticking in the valve body;
Damage to the forward clutch piston and/or wear in the Primary Pulley Bearing Bore
causing damage to the case.
Page 2
January, 2024
Bulletin No.: 24-NA-009
Verify DTC P2714 is set current or history.
Verify the transmission fluid is at the proper level following SI document 4818020.
Note: The transmission fluid temperature must be between 60°-80°C (140°-176°F) to
properly check the fluid level and to perform the following procedures.
Correction
1. If the fluid level is correct, with the transmission at operating temperature, drive the
vehicle and verify if there is a slip or lack of engagement in drive.
2. If there is no slip in drive, clear the DTCs.
3. Drive the vehicle, ensuring the vehicle is at operating temperature.
4. If the DTC does not immediately reset and there is no slip condition or no loss of
drive felt, perform 3 to 4 WOT accelerations.
5. If the DTC does not reset, replace the valve body (Not the solenoid valve body) and
re-evaluate.
If DTC P2714 re-sets, check the following:
• No forward motion but does have reverse
• Slips under heavy acceleration
• The DTC or the concern is repeatable
• If there is a drop in Primary and Secondary pulley pressure drop due to leak
• If the Primary and Secondary Pulley pressure drop on auto stop
– Pressure on auto stop should be around 400 kPa.
– If below 300 kPa, this may indicate that there could be a piston seal leak.
If there is a loss of drive, slipping, the fluid has a burnt odor, or any of the above indicators
are present, the transmission will need to be disassembled and inspected. Refer to the
Service Procedure below.
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.
Note: The first 2 graphics show the outside of the
pump, and the second 2 graphics show the wear that is
found internal to the pump when wear to the Primary
Pulley Bearing Bore is found.
Service Procedure
Remove and disassemble the transmission.
5892612
5896314
Inspect the Forward Clutch Piston for damage along
the side.
Bulletin No.: 24-NA-009
January, 2024
5892611
Page 3
5896313
If the Forward clutches are worn and there is damage
seen to the Forward Clutch Piston, then replace the
Forward Clutch Piston and Housing and the applicable
apply components as needed.
If there is no damage to the Forward Clutch Piston,
inspect the pump for signs of wear.
If signs of wear are seen as shown, this indicates the
Primary Pulley Bearing has spun in the bore and is
allowing the Turbine Shaft to become off center. When
this happens, it causes a pressure leak.
If this concern is found, the transmission will need to be
replaced.
Note: The Primary Pulley Bearing is installed on the
inside of the case on the primary pulley. This area of
the transmission cannot be accessed for inspection.
Inspection of the pump for DTC P2714 and no concern
found with the Forward Clutch Piston is critical.
5896315
Page 4
January, 2024
Bulletin No.: 24-NA-009
Parts Information
Note: Only select the parts that coincide with the repair
performed. Replace the part with the P/N outlined in the
Electronic Parts Catalog (EPC) in accordance with the
vehicle VIN.
Causal
Part
Description
Part
Number
Qty
X
Control
Valve Body
See
Electronic
Parts
Catalog
(EPC)
1
X
Forward Clutch
Piston
See EPC
1
X
Forward Clutch
Plate (Fiber)
See EPC
2
X
Forward Clutch
Apply Plate
See EPC
1
X
Forward Clutch
Plate (Waved)
See EPC
1
X
Forward Clutch
Plate (Steel)
See EPC
1
X
Forward Clutch
Piston Dam
See EPC
1
X
Forward Clutch
Piston Housing
See EPC
1
X
Transmission
Assembly
See EPC
1
N/A
FLUID
See EPC
As Required
Warranty Information
For vehicles repaired under the Powertrain coverage,
use the following labor operations. Reference the
Applicable Warranties section of Investigate Vehicle
History (IVH) for coverage information.
Labor
Operation
Description
Labor Time
8463690
Control Valve Body
Replacement
8465430
Forward Clutch
Replacement
8464670
Transmission Replacement
Use
Published
Labor Time
Version
1
Modified
Released January 10, 2024
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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