Bulletin No.:

Service Bulletin

16-NA-325

Date:

October, 2020

TECHNICAL
Subject:

Identifying Non-GM ECM Calibration Use and Power-up Hardware Detection in 2.8
Duramax Diesel Engines Using GDS 2
Model Year:

Brand:

Model:

Chevrolet

Colorado

2016

Chevrolet

Express

2017

GMC

Canyon

2016

GMC

Savana

2017

from

to

VIN:
from

to

Engine:

Transmission:
All

2.8L
Diesel (LWN)

2021

North America, Middle East, Israel, Palestine, GM Korea Company

Additional Options (RPO)

Equipped with Duramax® 2.8L Turbocharged Diesel Engine (RPO LWN)

General Motors does not warranty non-GM parts,
calibrations, and/or software modifications. The use of
parts, control module calibrations, software
modifications, and/or any other alterations not issued
through General Motors will void the warranty coverage
for those components that are damaged or otherwise
affected by the installation of the non-GM part, control
module calibration, software modification, and/or other
alteration.
This bulletin outlines the procedures to identify the
presence of non-GM (aftermarket) calibrations. GM
recommends performing this check whenever a hard
part failure is seen on internal engine, transmission,
transfer case or rear axle components, and before
disassembly, repair or replacement of an engine,
transmission, transfer case or rear axle assembly under
warranty. It is also recommended that the engine
calibration verification procedure be performed
whenever diagnostics indicate that an exhaust
after-treatment system component replacement is
necessary.

Copyright 2020 General Motors LLC. All Rights Reserved.

All
All

Involved Region or Country

General Motors Position on Aftermarket
Power-Up Devices

All

Various Symptoms Caused by an Aftermarket
Power-Up Kit or Hardware
•
•
•
•
•
•

Poor Performance
Drivability concerns
Increased emissions
Knocking noise
Engine damage
Black smoke from the exhaust. This symptom may
not occur if the diesel particulate filter (DPF) is in
good working condition. The DPF will trap black
exhaust smoke unless it is cracked, melted or has
been removed from the exhaust system.

GDS 2 Screen Shot Required by the
Calibration Group — 2016 GMC Canyon
Typical View of Screen Shots Generated
as a Report
Navigate to:
• Module Diagnostics
• Engine Control Module
• Identification Information
• Calibration History
Create a report and email it to the address below with
the required information.

Page 2

October, 2020

Bulletin No.: 16-NA-325

Instructions for E-Mailing the Required
Information and .jpg, .jpeg, .png, or
HTML Files to the Calibration Group
1. E-mail copies of the files to [email protected]
2. In the Subject line of the E-mail include the phrase
”Duramax® diesel”, the complete VIN and Service
Agent BAC.
Note: Properly providing the requested information in
Step 2 and Step 3 is extremely important.

4589153

3. In the Body of the E-mail include the following:
3.1. Complete VIN
3.2. Mileage
3.3. Job Card Number (R.O. Number)
3.4. Service Agent BAC
3.5. Service Personnel Name (Manager or
Technician)
3.6. A complete and comprehensive description of
the customer concern and cause of the
concern.
3.7. Include information about Aftermarket items
or abuse discovered, if any, on the vehicle.
Note: DO NOT cut and paste the GDS 2 screen shots
into the body of the e-mail. The .jpg, .jpeg or .png files
must be sent as e-mail ATTACHMENTS.
4. When sending the e-mail to the Calibration Group,
the .jpg, .jpeg or .png files must be “attached” to
the e-mail, in order to properly validate the
calibration.
Note: Include a return email address.

4589154

Note: repeated “FFFF”s or “0”s are harmless. They are
place holders.
Note: This is a typical GDS 2 screen shot generated
as a “Report”, and taken from a Model Year 2016 GMC
Canyon showing the: VIN, Calibration History,
Calibration Verification Number History and other
Associated Parameters. The VIN MUST appear on the
same screen as the calibrations numbers.
Depending on the computer screen configuration being
used and the Number of Calibration History Events
Stored, you may need to take two screen shots to
retrieve, save and view all of the information.

5. E-mails that are sent without all of the above
information and attachments as outlined, may be
returned to the sender with a request for the
missing information.
6. Remember to review your e-mail replies for further
information from the Calibration Group.
7. The Service Agent will receive an e-mail reply from
the Calibration Group after the calibrations have
been validated. Please allow up to 2 hours before
calling PQC/TAC. The e-mail reply will advise the
Service Agent if the calibrations are OEM.
8. The Service Personnel may call the PQC after
receiving their e-mail notification from the
Calibration Group informing them that the
calibrations are OEM, if required to do so for
Warranty Requirements. Be prepared to provide all
of the usual documentation that is normally
required when requesting an assembly
authorization from the PQC.
• If the Calibration Group determines that the
calibrations ARE aftermarket calibrations, DO
NOT contact GM Technical Assistance to
discuss warranty concerns on the aftermarket
calibrations. All questions and concerns about
warranty should be directed to the Service
Agent’s District Manager Aftersales (DMA) in
the United States and in Canada to the District
Manager - Customer Care and Service Process
(DM - CCSP).

Bulletin No.: 16-NA-325

October, 2020

Page 3

Warranty Information
•

The Service Management must be involved in any
situation that would justify the use of labor
operation 0600014.
• Notify the Service Agent’s District Manager
Aftersales (DMA) in the United States and in
Canada the District Manager - Customer Care and
Service Process (DM - CCSP).
• All claims will have to be routed to the Warranty
Support Center (WSC) for approval.
• Please refer to the latest version of Corporate
Bulletin Number 09-00-89-016, Labor Operation
0600014 - Suspected Tampering or Vehicle
Modifications for important information.
For vehicles repaired under warranty, use:
Labor
Operation

Description

Labor Time

0600014*

Suspected Tampering or
Vehicle Modifications

0.2 hr

*This is a unique Labor Operation for Bulletin use only.

Version

5

Modified

Released September 26, 2016
Revised September 05, 2017 - Added 2018 Model Year.
Revised July 23, 2018 - Added 2019 Model Year.
Revised September 19, 2019 - Added 2020 Model Year.
Revised October 16, 2020 - Added 2021 Model Year.

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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