20NA157

Bulletin No.:
Service Bulletin
Date:
20-NA-157
August, 2020
TECHNICAL
Subject:
Brand:
Buick
Cadillac
Chevrolet
Transport Mode On Message Displayed in Driver Information Center (DIC) and/or
Battery Light is Flashing
Model:
Model Year:
from
to
Encore
2013
2021
Encore GX
(VIN M)
2020
2021
Envision
2016
2021
Regal Tour X
2019
2020
Escalade
Models
2015
2020
CT4
2020
2021
CT5
2020
2021
CT6
2016
2020
XT4
2019
2021
XT5
2017
2021
XT6
2020
2021
Blazer
2019
2021
Bolt EV
2017
2021
Camaro
2016
2021
Colorado
2015
2021
Equinox
2018
2021
Impala
2014
2020
Malibu (VIN Z)
2016
2021
Silverado
2015
2021
Sonic
2012
2020
2013
2021
Suburban
2015
2021
Tahoe
2015
2021
Trailblazer
(VIN M)
2021
2021
Spark
Trax
Copyright 2020 General Motors LLC. All Rights Reserved.
VIN:
from
to
—
—
Engine:
Transmission:
All
All
Page 2
Brand:
GMC
August, 2020
Model:
Model Year:
from
to
Acadia
2017
2021
Canyon
2015
2021
Sierra
2015
2021
Terrain
2018
2021
Yukon
2015
2021
Yukon XL
2015
2021
Involved Region or Country
Bulletin No.: 20-NA-157
VIN:
from
Engine:
Transmission:
to
North America, Europe, China, Japan, GM Korea, Russia, Middle East, Israel, South
Africa, Philippines, Thailand, Argentina, Brazil, Chile, Colombia, Ecuador, Peru
Condition
Procedure
Some customers may comment that the Transport
Mode On message is displayed in the DIC and/or the
red battery light is flashing. Transport Mode is intended
for use for vehicles being shipped over long distances,
and includes vehicles shipped into and outside of the
United States and Canada.
Some products will be shipped from the assembly plant
with Transport Mode On. The Transport Mode feature
when enabled reduces the parasitic electrical load on
the battery when the vehicle is parked, which extends
the battery stand time up to 70 days without the battery
going dead.
To alert the operator that Transport Mode On is
enabled, the red battery light will be flashing and if
equipped with a DIC, it will display a Transport Mode
On message. Twenty-four hours after transport mode is
turned On, with the vehicle Off, the key must be used to
enter the vehicle, as the following functions will be
disabled: Passive Entry, Remote Keyless Entry,
Content Theft. For 2016 and beyond. Full-Size SUVs
(Cadillac Escalade models, Chevrolet Suburban,
Tahoe, GMC Yukon Models); the Remote Keyless Entry
function will remain enabled during transport mode,
allowing entry without a key. Exit lighting timers will
function but will be reduced.
Note: For PEPS vehicles in Transport Mode On, the
key fob will operate for the Start/Stop button, as
long as the fob is inside the vehicle.
Note: Normal vehicle diagnostics and/or service
procedures should not be performed when
Transport Mode is On. Turn Transport Mode Off
prior to performing system checks or service
procedures.
When the vehicle is running, the only difference in
operation will be the DIC Message and the battery light
flashing. The Passive Entry and Remote Keyless Entry
functions are restored with the ignition in Run.
The mode should be left On while the vehicle is in
dealer inventory. Also a customer may want to use the
mode if the vehicle is going to be stored. The method to
turn the mode Off is the same to turn the mode On.
Refer to the Procedure section.
Tip: The EL-52800 E-XTEQ Diagnostic Charge
Battery Station (DCBS) or EL-50313 Midtronics GR8
Battery Tester/Charger must be used for
maintaining batteries on new vehicles in dealer
inventory.
With Transport Mode On, enter the vehicle using the
steps below:
1. Attempt to unlock the vehicle with the FOB.
2. If the vehicle is not responding to the FOB, press
the PEPS door handle switch a few times (if
equipped) then attempt to unlock the vehicle with
the FOB.
3. If the vehicle is not responding to the FOB, the key
must be used to enter the vehicle.
4. Turn the Transport Mode On/Off using the vehicle
specific procedure.
2019-2021 Chevrolet Silverado and GMC Sierra
/ 2016-2021 Chevrolet Malibu / 2019-2021
Cadillac XT4
Transport Mode is enabled by activating the hazard
flashers, applying the brake pedal, and then turning the
ignition key to the start position or pushing the ignition
mode switch with the foot on the brake for greater than
15 seconds. The mode is disabled by repeating the
previous process. The DIC (if equipped) will display
Transport Mode On when enabled and Transport Mode
Off when disabled. For vehicles not equipped with a
DIC, the battery indicator light will constantly flash on
the instrument cluster when Transport Mode is On. This
feature can be used as many times as necessary if the
vehicle is to be stored for an extended period of time.
2017-2021 Chevrolet Bolt EV
To turn Transport Mode On/Off, start the vehicle (as
indicated by the green Ready light), activate the hazard
flashers, press and hold the brake pedal, then press
and hold the Start/Stop button at least 15 seconds.
Transport Mode On/Off message will display on the
DIC. Then turn the hazard flashers off. Allow the
vehicle to sleep at least 2 minutes prior to restarting.
Bulletin No.: 20-NA-157
August, 2020
Page 3
2016-2021 Buick Envision / 2019-2021
Chevrolet Blazer / 2018-2021 Chevrolet
Equinox, GMC Terrain / 2017-2021 Cadillac XT5
/ 2017-2021 GMC Acadia / 2020-2021
Cadillac XT6
To turn Transport Mode On/Off, start the vehicle, press
the brake pedal, activate the hazard flashers, hold the
start button for at least 15 seconds. Transport Mode
On/Off message will display on the DIC and the Battery
Warning light will flash.
2011-2021 ALL OTHER Vehicles Procedure
To turn Transport Mode On/Off, start the vehicle,
activate the hazard flashers, press the brake pedal
(automatic transmission) or clutch pedal (manual
transmission) then press and hold the Start/Stop button
or turn the ignition key to the crank position for 15
seconds. (The engine will turn Off on push button
vehicles.) The same steps are used to turn On the
feature.
Note: Vehicles that are shipped from the assembly
plant with Transport Mode On, turning the feature
Off is included in the normal PDI process time. No
additional warranty claims should be submitted to
disable or enable this feature.
Version
1
Modified
August 12, 2020 – Corporate Service Bulletin Number 11-08-49-001Z has now become
Global template format Service Bulletin 20-NA-157 (version 1). This update adds 2020
and 2021 Model Years to certain Models, removes other Models to which the Condition
no longer pertains, removes the Attention statement, adds Export regions, updates the
Tip regarding battery charging and the Condition and Procedure sections were updated
to reflect the proper Model/Model Year changes.
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.
WE SUPPORT VOLUNTARY
TECHNICIAN
CERTIFICATION