19-NA-200

Service Bulletin
Bulletin No.:
19-NA-200
Date:
May, 2023
TECHNICAL
Subject:
Start/Stop Inoperative, Malfunction Indicator Lamp (MIL) Illuminated – DTC P2797 Set
This bulletin replaces PIP5672. Please discard PIP5672.
Model Year:
Brand:
Model:
Buick
Encore GX
2020
Malibu
2019
Chevrolet
Trailblazer
(VIN M)
2021
from
VIN:
to
from
to
2023
—
—
Engine:
Transmission:
—
VT40 Automatic
(RPO MRG)
Involved Region or Country
North America, Israel, GM Korea Company
Condition
Some customers may comment on one or more of the following conditions:
• Start/Stop inoperative
• MIL illuminated
Some technicians may find DTC P2797 (Auxiliary Transmission Fluid Pump
Performance) set in the Transmission Control Module (TCM).
Cause
This condition may be caused by an internal failure in the auxiliary fluid pump.
Correction
Replace the auxiliary transmission pump and wiring harness. Refer to Automatic
Transmission Fluid Pump Removal and Automatic Transmission Fluid Pump Installation
in SI.
Important: To remove the pump assembly, grasp the turbine shaft and remove the
forward clutch and pump assembly as one piece. Keep the clutch assembly inserted in
the pump. This will protect the shaft seals and they will not need to be replaced.
⇒ Refer to Transmission Fluid Pump Disassemble in SI for instructions on
replacing the auxiliary pump.
Copyright 2023 General Motors LLC. All Rights Reserved.
Page 2
May, 2023
Bulletin No.: 19-NA-200
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.
Parts Information
Causal
Part
Description
Part
Number
Qty
X
PUMP, A/TRNS
AUX FLUID
24297279
1
N/A
HARNESS, A/
TRNS WRG
24298763
1
FLUID, A/TRNS
19355873
(U.S.)
(in Canada,
19355874)
(in Korea,
93747663)
4
N/A
Warranty Information
For vehicles repaired under warranty, use:
Labor
Operation
8463490
Description
Labor Time
Transmission Auxiliary Fluid
Pump Replacement
Use
Published
Labor
Operation
Time
Version
7
Modified
Released November 14, 2019
Revised April 6, 2020 – Added a Note to the Correction section.
Revised May 29, 2020 – Added Trailblazer to the Model section, Korea to the Involved
Region or Country section and Korean part numbers to the Parts Information table.
Revised September 10, 2020 – Updated the Labor Operation number.
Revised February 18, 2021 – Added the Encore GX Model, 2021 Model Year to Malibu,
removed the Note and added to replace wiring harness to Correction section and added
Wiring Harness Part Number to Parts Information section.
Revised March 15, 2021 – Updated the Warranty Information section.
Revised April 28, 2023 – Added the 2022–2023 Model Years and updated the Pump Part
Number information.
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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