19NA200

Bulletin No.:
Service Bulletin
Date:
19-NA-200
March, 2021
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
2021
—
—
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.
Replace the auxiliary transmission pump and wiring harness. Refer to Automatic
Transmission Fluid Pump Removal and 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.
Correction
⇒ Refer to Transmission Fluid Pump Disassemble for instructions on replacing
the auxiliary pump.
Parts Information
Causal
Part
Description
Warranty Information
Part
Number
Qty
Labor
Operation
X
PUMP, A/TRNS
AUX FLUID
24299204
(in Korea,
24297279)
N/A
HARNESS, A/
TRNS WRG
24298763
1
FLUID, A/TRNS
19355873
(U.S.)
(in Canada,
19355874)
(in Korea,
93747663)
4
N/A
For vehicles repaired under warranty, use:
1
8463490
Copyright 2021 General Motors LLC. All Rights Reserved.
Description
Labor Time
Transmission Auxiliary Fluid
Pump Replacement
Use
Published
Labor
Operation
Time
Page 2
March, 2021
Bulletin No.: 19-NA-200
Version
6
Modified
Released November 14, 2019
April 6, 2020 – Added a Note to the Correction section.
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.
September 10, 2020 – Updated the Labor Operation number.
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.
March 15, 2021 – Updated the Warranty Information section.
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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