NHTSA ID Number: 10180315
Manufacturer Communication Number: 20NA157
TSB/Document Date: 2020-09-28
Summary
This bulletin provides information on the Transport Mode On Message Being Displayed in the Driver Information Center (DIC) and/or Battery Light is Flashing and the procedures to turn the Transport Mode message ON and OFF.
Bulletin No.:
Service Bulletin
Date:
20-NA-157
August, 2020
TECHNICAL
Subject:
Brand:
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
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:
All
All
Page 2
Brand:
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:
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
- High density negative paste, improves performance and...
- Enhanced life alloy or Silver Calcium stamped alloy...
- Calcium lead positive grid, maximizes conductivity and...
- Robust envelope separator with puncture resistant back...
- Vent cap design that resists acid leakage
- High density negative paste, improves performance and...
- Enhanced life alloy or Silver Calcium stamped alloy...
- Calcium Lead positive grid, maximizes conductivity and...
- Robust Envelope Separator with puncture-resistant back...
- Vent cap design that resists acid leakage
Last update on 2026-06-29 / Affiliate links / Images from Amazon Product Advertising API
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: 20NA157
Replacement Service Bulletin Number:
MFR Communication Date: 2020-08-12
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- [2026 Top-Tier Hardware and Software Upgrade]: Topdon ArtiDiag900 Lite scanner has enhanced hardware and latest features, including Android 11.0, 5x faster CPU, 10000mAh battery for 12 hours of continuous operation, stable wireless diagnosis with Bluetooth 5.0, 8-inch touchscreen. Added bi-directional control, wireless diagnosis, battery testing (optional), and DTC repair guide
- [TOPDON Bidirectional Scan Tool]: This bidirectional obd2 scanner sends commands to the vehicle's ECU for active testing, enabling users to accurately and quickly locate faulty components such as injectors, coolant pumps, windows, wipers, headlights, mirrors, etc. The bidirectional control scanner is the ideal choice for workshops/automotive repair shops as it significantly reduces mechanic's diagnostic time.
- [Wireless Bluetooth Diagnostic Experience]: The AD900 Lite scan tool comes with a Bluetooth 5.0 VCI, supporting a wireless diagnostic range of up to 33 feet (10 meters), allowing you to diagnose without being confined to cables or tight spaces. Stable and fast wireless diagnosis provides a comfortable repair environment. It also offers VCI cables to increase connectivity options.
- [DTC Repair Guide Function]: Easily diagnose issues with your vehicle and receive guidance on repairs with the topdon scan tool's fault code definitions for all systems,maximize your diagnostic capabilities. This function is compatible with Chrysler
/Dodge/Jeep/Fiat 2010-2014 and expanding with continual updates,the AritDiag 900 Lite car diagnostic scanner is the must-have tool for any technician or DIY enthusiast. - [OE-Level Full System Diagnostics]:AritDiag900 Lite full system diagnostic scanner can scan ALL available modules(Engine, Transmission, Airbag, ABS, ESP, TPMS, Gateway, Steering, Radio, Air conditioning, ect.) to✔read ECU info, ✔read/clear codes, ✔view live data stream, ✔retrieves freeze-frame, ✔perform active tests, and more. With just a simple click, it provides you with accurate and in-depth diagnostics.
- Dual WiFi & 10.1" Touchscreen: Provides a stable, high-speed wireless link 3x faster than bluetooth, and a responsive, professional interface. Topdon ONE obd2 scanner diagnostic tool ensures smooth, non-lagging diagnostic scan, boosting mechanic efficiency
- J2534 Pass-Thru Support: The included ONE VCI supports the J2534 standard, allowing it to function as a pass-thru device when paired with OEM diagnostic software.Through TOPDON’s RLink platform, technicians can perform dealer-level coding, expanding in-house capabilities without investing in multiple factory automotive scan tools
- OE Topology Mapping: Visualize the vehicle’s ECU network exactly as it’s built.Zoom, pan, and highlight specific modules to pinpoint component issues with precision.Topology mapping displays real-time communication between modules
- 50 Plus Service Functions: Covers high-demand services like ADAS calibration, DPF regen, TPMS reset, ABS bleed, and throttle adaptation.Expands your service menu, allows you to charge premium rates, and turns away zero jobs due to lack of tooling. Vehicle-specific functionality may vary
- Advaned ECU Coding: 10 of the most serviced brands in North America, including full ECU coding and flash hidden support for BMW, VW, Au-di, Benz, Porsche, Toyota, Ni ssan and more. Enables module replacement, feature customization, and personal settings with automatic backup or restore.Lets your shop safely offer high-margin customization services, attracting more customers and boosting profit
- Bi-Directional Control, Quickly Locate Problems: Turn your phone into a professional diagnostic tool. You can send commands from your phone to the ECU to test injectors, cooling fans, headlights, A/C clutch, windows, wipers, and more. See which one doesn't respond. Helps you quickly locate the problem and save time. No need to tear things apart, avoid blind disassembly.
- Flexible Subscription, Choose Advanced Features as Needed: TopScan Lite provides free-for-life access to core diagnostics, including full system scan, code reading, performance tests, and repair information. After purchase, advanced features (bi-directional control, service operations, live data, code clearing, and AI functions) are free-for-the-first-year. After the first year, if you want to use advanced features, you need to subscribe on a monthly, quarterly, or yearly basis. As new models and reset functions are updated, the tool will also be continuously upgraded.
- Full System Diagnostics, No Fault Hides: Unlike basic diagnostic tools that only cover 4 systems, TopScan can scan all systems. Read and clear trouble codes, view live data streams, and generate a complete vehicle health report – all issues are clear at a glance. Covers 10,000+ vehicle models and is compatible with 99.99% of vehicles.
- AI Assistant - TopFix: Think of TopFix as your personal AI mechanic. It leverages a repair database and OEM data to deliver clear, step-by-step repair solutions. Features include AI Q&A, one-click translation, and a full repair log, making your diagnostic process simpler and more efficient.
- 8+ Hot Resets, Keep Your Car in Top Shape: One-tap resets for oil, throttle, EPB, steering angle, DPF, ABS, BMS, and airbag. It enables car owners to easily perform essential maintenance, ensuring the vehicle stays in optimal condition and extends its service life.
Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.