19NA023

Bulletin No.:
Service Bulletin
Date:
19-NA-023
September, 2020
TECHNICAL
Subject:
High Pitch Whine Noise Heard at 32-56 km/h (20-35 mph) in Any Gear Under Light to
Moderate Acceleration
Brand:
Model:
Chevrolet
Equinox
GMC
Terrain
Holden
Equinox
Model Year:
from
Breakpoint:
to
from
to
2021
2018
-
-
2020
Engine:
Equipped
with 2.0L
Engine
(RPO LTG)
Transmission:
Equipped with
Automatic
Transmission
(RPOs M3U,
M3D, M3H)
Involved Region or Country
North America, Middle East, Israel, Palestine, Argentina, Brazil, Chile, Columbia,
Ecuador, Paraguay, Peru, Uruguay, China, Thailand, Australia, New Zealand, Egypt and
Africa.
Condition
Some customers with 9 speed transmissions may comment on a high pitch whine noise
heard from approx. 32-56 km/h (20-35 mph) in any gear under light to moderate
acceleration.
Cause
This condition may be caused by a frequency getting transmitted from the transmission
through the left axle.
Correction
Replace the left front half shaft with the PN# listed below which has a dampener to
correct this issue. Refer to Front Wheel Drive Half Shaft Replacement - Left Side in SI.
Parts Information
Causal
Part
Description
Part
Number
Qty
X
SHAFT ASM-FRT
WHL DRV HALF
84560820
1
Warranty Information
For vehicles repaired under the Bumper-to-Bumper
coverage (Canada Base Warranty coverage), use the
following labor operation. Reference the Applicable
Warranties section of Investigate Vehicle History (IVH)
for coverage information.
Labor Operation
Description
Labor Time
3080338*
Replacing Front Wheel Drive Half Shaft - Left Side
0.7 hrs
*This is a unique Labor Operation for Bulletin use only.
Copyright 2020 General Motors LLC. All Rights Reserved.
Page 2
September, 2020
Bulletin No.: 19-NA-023
Version
3
Modified
Released May 29, 2019
Revised November 21, 2019 – Added Transmission RPOs.
Revised September 15, 2020 – Revised to add 2020 Model Year Holden Equinox and
2020–2021 Model Years Equinox/Terrain.
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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