Identifying Non-GM (Aftermarket) Engine Calibrations for Gasoline Engines Using Tech 2 or GDS 2 (U.S. and Canada) – GM Passenger Cars and Light Duty Trucks

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Service Bulletin Bulletin No.: 09-06-04-026S
Date: December, 2020
INFORMATION
Subject: Identifying Non-GM (Aftermarket) Engine Calibrations for Gasoline Engines Using
Tech 2® or GDS 2 (U.S. and Canada)
Models: 2005-2006 Chevrolet Corvette – Equipped with any V8 Gasoline Engine
2007-2021 GM Passenger Cars and Light Duty Trucks – Equipped with any
V8 Gasoline Engine
2012-2021 GM Passenger Cars and Light Duty Trucks – Equipped with any HFV6
Gasoline Engine
2019-2021 GM Passenger Cars and Light Duty Trucks – Equipped with 2.0L (RPO LSY)
or 2.7L (RPO L3B) Gasoline Engines
Attention: Refer to the GM Service Policy and Procedures Manual for the latest GM Policy and
Procedures Information. This Bulletin also applies to any of the above models that may
be Export vehicles from North America.
This bulletin has been revised to add the 2021 Model Year Passenger Cars and Light Duty
Trucks. Please discard Corporate Bulletin Number 09-06-04-026R.
Table of Contents
• 1. Engine, Transmission, Transfer Case, Rear
Axle Components and Catalytic Converter
Failures Due to Non-GM ECM Calibrations
Being Installed
• 2. Calibration Retrieval and Calibration
Verification Procedure for Service Agents NOT
REQUIRED to Call PQC for Powertrain/
Drivetrain Assembly Replacement
Authorization
• 3. Calibration Retrieval and Calibration
Verification Procedure for Service Agents
REQUIRED to Call PQC for Powertrain/
Drivetrain Assembly Replacement
Authorization
• 4. Retrieving Engine Calibration ID and
Verification No. (Number) Information Using
the Tech 2® – This Action is Required for ALL
Service Agents (Model Dependent)
• 5. Tech 2® Displaying All Zeroes for the
Verification Numbers on the Vehicle
Information – Calibration ID and Verification
No. (Number/CVN) Screen
• 6. Retrieving Calibration Information From
Global A Vehicles Using GDS 2 – This Action is
Required for ALL Service Agents (Model
Dependent)
• 7. Creating a .jpg or .jpeg File From a GDS 2
Calibration History Screen Shot Using
Microsoft Paint
• 8. Calibration Verification Procedure — For
Service Agents NOT REQUIRED to Call PQC
for Powertrain/Drivetrain Assembly
Replacement Authorization — Using the Tech
2® or GDS 2
8. A. Calibration Verification Procedure —
Using the Tech 2®
8. B. Calibration Verification Procedure —
Using GDS 2
• 9. Calibration Verification Procedure — For
Service Agents REQUIRED to Call PQC for
Powertrain/Drivetrain Assembly Replacement
Authorization — This Procedure MUST be
Performed by the Calibrations Group
• 10. Procedure for ALL Service Agents for
E-mailing .jpg or .jpeg Files to the Calibration
Group at — TACCVN@gm.com
• 11. Calibrations Group – New E-mail Address –
TACCVN@gm.com
• 12. Warranty Information
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1. Engine, Transmission, Transfer Case,
Rear Axle Components and Catalytic
Converter Failures Due to Non-GM ECM
Calibrations Being Installed
Notice:
• Be advised that GM REQUIRES retrieving the
Calibration Information and performing the
Calibration Verification Procedure as outlined
in this Bulletin, whenever diagnostics
determine a hard part failure may have
occurred on internal engine parts and BEFORE
disassembly, repair or replacement of an
engine assembly under warranty.
• Be advised that GM strongly recommends
retrieving the Calibration Information and
performing the Calibration Verification
Procedure as outlined in this Bulletin,
whenever diagnostics determine a hard part
failure may have occurred on transmission,
transfer case or rear axle components and
before disassembly, repair or replacement of a
transmission, transfer case or rear axle
assembly under warranty. It is also
recommended that the ECM Calibration
Verification Procedure be performed whenever
diagnostics determine that catalytic converter
replacement is necessary.
• It is not a requirement to verify transmission
control module calibrations on gasoline engine
applications.
General Motors is identifying an increasing number of
engine, transmission and catalytic converter part
failures that are the result of non-GM ECM calibrations
being installed.
When alteration to the GM-released ECM calibration
occurs, it subjects powertrain and driveline components
such as engine, transmission, transfer case, driveshaft
and the rear axle to stresses that were not tested by
General Motors. It is because of these unknown
stresses, and the potential to alter reliability, durability
and emissions performance, that GM has adopted a
policy that prevents any UNAUTHORIZED Service
Agent Warranty Transaction submissions to any
remaining warranty coverage, to the powertrain and
driveline components whenever the presence of a
non-GM calibration is confirmed, even if the non-GM
ECM calibration is subsequently removed.
Warranty coverage is based on the equipment and
ECM calibrations that were released on the vehicle at
time of sale, or subsequently updated by GM. That’s
because GM testing and validation matches the
calibration to a host of criteria that is essential to assure
reliability, durability and emissions performance over
the life of the warranty coverage and beyond. Stresses
resulting from calibrations that are different from those
tested and released by GM can damage and/or weaken
components, leading to poor performance and/or
shortened life.
Additionally, non-GM issued ECM modifications often
do not meet the same emissions performance
standards as GM issued calibrations. Depending on
state statutes, individuals who install ECM calibrations
that put the vehicle outside the parameters of
emissions certification standards may be subject to
fines and/or penalties.
This bulletin outlines the Calibration Retrieval and
Calibration Verification Procedures for ALL Service
Agents including Service Agents NOT Required to Call
PQC for Powertrain/Drivetrain Assembly Replacement
Authorization and Service Agents Required to Call
PQC for Powertrain/Drivetrain Assembly Replacement
Authorization, using the Tech 2® or GDS 2 to identify
the presence of non-GM control module calibrations.
If a non-GM calibration is found and verification has
taken place through GM, the remaining powertrain and
driveline warranty may be blocked and notated in
Global Warranty Management (GWM) and the
dealership will be notified. This block prevents any
UNAUTHORIZED warranty claim submission.
2. Calibration Retrieval and Calibration
Verification Procedure for Service
Agents NOT REQUIRED to Call PQC for
Powertrain/Drivetrain Assembly
Replacement Authorization
Notice:
• The Service Agent Service Department
Personnel is NOT REQUIRED TO E-MAIL TAC
the digital Calibration Verification photos from
the Tech 2® screen or GDS 2 screen shot,
UNLESS non-GM calibrations are found.
• The Service Agent Service Department
Personnel is REQUIRED TO RETAIN ALL of the
related documentation showing the Calibration
Information was Retrieved and the Calibration
Verification Procedure was completed, in the
Service Agent Vehicle History Service File.
1. Depending on the vehicle being serviced, the
Service Department Personnel is required to
complete one of the following procedures, either
Step 1.1 or Step 1.2 in order to ensure that there
are not any non-GM ECM calibrations present:
1.1. Section 4. Retrieving Engine Calibration ID
and Verification No. (Number) Information
Using the Tech 2®
After retrieving the calibration information,
Go to Step 2.
OR
1.2. Section 6. Retrieving Calibration
Information From Global A Vehicles Using
GDS 2
After retrieving the calibration information,
Go to Step 2.
2. After retrieving the Calibration Information and
performing Section: 8. Calibration Verification
Procedure — For Service Agents NOT
REQUIRED to Call PQC for Powertrain/
Drivetrain Assembly Replacement
Authorization — Using the Tech 2® or GDS 2
the Service Department Personnel is required to
Bulletin No.: 09-06-04-026S December, 2020 Page 3
retain all of the related documentation showing the
procedures were completed in the Service Agent
Vehicle History Service File.
⇒ If the Calibration Verification Procedure
determines that THERE ARE non-GM ECM
calibrations present, the Service Department
Personnel MUST follow the procedure as
instructed in: Section 10. Procedure for All
Service Agents for E-mailing .jpg or .jpeg
Files to the Calibration Group at —
TACCVN@gm.com
3. When returning an engine assembly that is
requested through the WPC Parts Return Program,
a printed copy of the Tech 2® Vehicle Information
– Engine Calibration ID and Verification No.
(Number/CVN) screen or the GDS 2 Calibration
History (Events) screen shot must be attached to
the documentation being returned with the unit.
Notice: For additional information, refer to Service
Bulletins 20-NA-138 (U.S.) and 16-NA-338 (Canada
Only): Warranty Administration – Engine and
Transmission Assembly Replacement and PQC
Process.
3. Calibration Retrieval and Calibration
Verification Procedure for Service
Agents REQUIRED to Call PQC for
Powertrain/Drivetrain Assembly
Replacement Authorization
Notice:
• The Service Agent Service Department
Personnel is REQUIRED TO E-MAIL TAC the
digital Calibration Verification photos from the
Tech 2® screen or GDS 2 screen shot in .jpg or
.jpeg format only, to the following e-mail
address: TACCVN@gm.com
• The Service Agent Service Department
Personnel is REQUIRED TO RETAIN ALL of the
related documentation showing the Calibration
Information was Retrieved and the Calibration
Verification Procedure was performed by the
Calibrations Group which is their e-mail
response, in the Service Agent Vehicle History
Service File.
1. Depending on the vehicle being serviced, the
Service Department Personnel is required to
complete one of the following procedures, either
Step 1.1 or Step 1.2 in order to ensure that there
are not any non-GM ECM calibrations present:
1.1. Section 4. Retrieving Engine Calibration ID
and Verification No. (Number) Information
Using the Tech 2®
OR
1.2. Section 6. Retrieving Calibration
Information From Global A Vehicles Using
GDS 2
2. After retrieving the Calibration Information and
referring to Section: 9. Calibration Verification
Procedure — For Service Agents Required to
Call PQC for Powertrain/Drivetrain Assembly
Replacement Authorization — MUST be
Performed by the Calibrations Group , follow the
procedure in Section 10. Procedure for All
Service Agents for E-mailing .jpg or .jpeg Files
to the Calibration Group at —
TACCVN@gm.com
3. The Service Department Personnel is required to
retain all of the related documentation showing the
procedures were completed in the Service Agent
Vehicle History Service File.
4. When returning an engine assembly that is
requested through the WPC Parts Return Program,
a printed copy of the Tech 2® Vehicle Information
– Engine Calibration ID and Verification No.
(Number/CVN) screen OR the GDS 2 Calibration
History (Events) screen shot must be attached to
the documentation being returned with the unit.
4. Retrieving Engine Calibration ID and
Verification No. (Number) Information
Using the Tech 2® – This Action is
Required for ALL Service Agents
(Model Dependent)
Notice: This information applies to vehicles that
are Tech 2® compatible and is typical of the
procedure that will be used.
1. Connect the Tech 2® to the vehicle.
2. Go to: Diagnostics and build the vehicle.
3. Select: Powertrain.
4. Select: Engine.
5. Select: Engine Control Module or PCM.
6. Select: Module ID Information or I/M Information
System if the Module ID Information selection is
not available.
7. If: “I/M information System” was selected, it may
be necessary to select “Vehicle Information” in
order to display the calibration information.
⇒ If the CVN information is displayed as “N/A”, it
will be necessary to contact the TCSC at
1-800-828-6860 for English or 1-800-503-3222
for French to obtain the CVN information.
⇒ If the CVN Information is displayed as all
zeroes, refer to Section: 5. Tech 2® Displaying
All Zeroes for the Verification Numbers on
the Vehicle Information – Calibration ID and
Verification No. (Number/CVN) Screen
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Notice:
• Two examples of the Tech 2® Vehicle
Information – (Engine) Calibration ID and
Verification No. screens are shown.
• The Tech 2® Vehicle Information –
Calibration ID and Verification No. screen
will differ slightly depending on vehicle and
model year.
8. Take a CLEAR digital picture(s) of the Tech 2®
Vehicle Information screen showing the entire VIN,
(Engine) Calibration ID and Verification No.
(Number/CVN) and save it in .jpg format.
Notice: It is recommended that an electronic copy
of the Tech 2® screen photograph(s) also be saved.
9. Retain the printout information and the Tech 2®
screen photograph(s) with the repair order.
5. Tech 2® Displaying All Zeroes for the
Verification Numbers on the Vehicle
Information – Calibration ID and
Verification No. (Number/CVN) Screen
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If the Tech 2® that is being used displays all zeroes for
the Verification Numbers as shown, then perform the
following steps:
1. Update the Tech 2® with the latest software from
TIS2WEB.
2. Turn OFF the ignition for 90 seconds.
3. Connect the Tech 2® to the vehicle.
4. Turn ON the ignition, and build the vehicle.
Observe the Tech 2® Vehicle Information –
Calibration ID and Verification No. (Number/CVN)
screen for proper operation.
⇒ If the Tech 2® screen still does not display
properly, then turn OFF the ignition for 90
seconds again. Turn ON the ignition and
observe the same screen for proper operation.
6. Retrieving Calibration Information
From Global A Vehicles Using GDS 2 –
This Action is Required for ALL Service
Agents (Model Dependent)
Notice: This information applies to Global A – GDS
2 compatible vehicles and is typical of the
procedure that will be used.
1. Turn OFF the ignition.
2. Connect the MDI to the Data Link Connector (DLC)
of the vehicle.
Notice: Use the USB port to make the following MDI
connection:
3. Connect the MDI to a PC or laptop that has been
downloaded with the GDS 2 application from
TIS2WEB.
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Notice: At least one Diagnostic Package must be
installed on the PC to perform diagnostics. If GDS 2
was just installed, select: Add New Diagnostic
Package and then select a: Diagnostic Package to
download.
4. Select: GDS 2 icon on the PC.
5. Select: Diagnostics icon.
6. Select: serial number of the MDI being used.
7. Select: Enter icon.
8. Select: Module Diagnostics.
9. Select: Engine Control Module.
Notice: Due to the model selected, vehicle build,
software and RPO variations, GDS 2 may ask for
additional information in Step 10.
10. Select: Engine ID, if prompted.
11. Select: ID Information.
12. The Diagnostics page will appear.
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Notice: This is a typical view of a GDS 2 Calibration
History Events Screen. GDS 2 is capable of
displaying up to 10 Calibration History Events.
13. Select: Calibration History from the drop down
menu in order to display the following items on the
screen, including the VIN:
• Calibration History Buffer
• Number of Calibration History Events Stored
• Calibration Part Number History
• Calibration Verification Number History
14. Select: Save Report.
Note: Repeated “FFFF”s or “0000”s are harmless.
They are place holders, and are not actual calibrations.
It is not necessary to photograph extra screens
containing only this type of calibration (FFFF’s or
0000’s).
15. Select: Print.
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Notice: It is recommended that an electronic copy
of the GDS 2 Calibration History also be saved.
Refer to Section: 7. Creating a .jpg or .jpeg File
From a GDS 2 Calibration History Screen Shot
Using Microsoft Paint
16. Retain a copy of the printed screen shot with
the repair order.
7. Creating a .jpg or .jpeg File From a
GDS 2 Calibration History Screen Shot
Using Microsoft Paint
1. Select: Start icon.
2. Select: All Programs.
3. Select: Accessories.
4. Select: Paint.
5. Navigate to: Calibration History .
6. Press the: Print Scrn button.
7. Open: Microsoft Paint.
8. Select: Paste.
9. Select: Save As.
10. Select: Desktop.
11. Select: File name. Name the file. As an example
use the VIN.
12. Select: Save as type, using the drop down menu.
13. Select: JPEG
8. Calibration Verification Procedure —
For Service Agents NOT REQUIRED to
Call PQC for Powertrain/Drivetrain
Assembly Replacement Authorization
— Using the Tech 2® or GDS 2
1. Go to: TIS2WEB Home Page.
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2. Select: Calibration Information (SPS Info).
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3. Enter the: VIN.
4. Select: Get Cal ID.
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5. Select: ECM Engine Control Module —
Programming from the Controller dropdown
menu and select: Next.
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6. Select: Complete History at the top left or bottom
left of the page to access the GM Vehicle
Calibration Information screen, which displays all
of the GM Approved Calibrations and CVNs
(Calibration Verification Numbers).
⇒ If the vehicle being serviced requires using the
Tech 2® , Go to subsection: 8. A. Calibration
Verification Procedure — Using the Tech 2®
⇒ If the vehicle being serviced requires using
GDS 2, Go to subsection: 8. B. Calibration
Verification Procedure — Using GDS 2
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8. A. Calibration Verification Procedure — Using the
Tech 2®
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Compare each: Calibration ID Part Number and
Verification No. (Number/CVN) from your Tech 2®
photo to the corresponding Calibration ID Part
Number and Verification No. (Number/CVN) listed in
the TIS2WEB GM Vehicle Calibration Information
screen of TIS2WEB to ensure that they are ALL an
EXACT MATCH.
⇒ If ANY of the Calibration ID Part Number and
Verification No. (Number/CVN) when COMPARED
to the Calibration ID Part Number and Verification
No. (Number/CVN) listed in the TIS2WEB GM
Vehicle Calibration Information screen, DO NOT
MATCH, then non-GM calibrations may be present
and you should follow the procedure in Section: 10.
Procedure for All Service Agents for E-mailing
.jpg or JPEG Files to the Calibration Group at —
TACCVN@gm.com in order to e-mail your findings
to the Calibration Group, who will then document
your information with the appropriate Brand Quality
Manager in the Brand Quality Team.
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8. B. Calibration Verification Procedure — Using
GDS 2
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Compare each: Engine Calibration Part Number
History parameter and Calibration Verification
Number History parameter from the GDS 2
Calibration History screen to the Calibration Part
Number and Calibration Verification Number (CVN)
listed in the GM Vehicle Calibration Information
screen of TIS2WEB to ensure that they are ALL an
EXACT MATCH.
⇒ If ANY Engine Calibration Part Number History
parameter and Calibration Verification Number
History parameter when COMPARED to the Engine
Calibration Part Number History parameter and
Calibration Verification Number History listed in the
TIS2WEB GM Vehicle Calibration Information
screen, DO NOT MATCH, then non-GM
calibrations may be present and you should follow
the procedure in Section: 10. procedure for All
Service Agents for E-mailing .jpg or JPEG Files
to the Calibration Group at —
TACCVN@gm.com in order to e-mail your findings
to the Calibration Group, who will then document
your information with the appropriate Brand Quality
Manager in the Brand Quality Team.
9. Calibration Verification Procedure —
For Service Agents REQUIRED to Call
PQC for Powertrain/Drivetrain
Assembly Replacement Authorization
— This Procedure MUST be Performed
by the Calibrations Group
Notice: For Service Agents Required to Call PQC
for Powertrain/Drivetrain Assembly Replacement
Authorization, the Calibration Verification
Procedure MUST be Performed by the Calibrations
Group
1. Assemble the Calibration Information that was
retrieved when you performed Section: 4.
Retrieving Engine Calibration ID and
Verification No. (Number) Information Using the
Tech 2® – This Action is Required for ALL
Service Agents (Model Dependent)
OR
2. Assemble the Calibration Information that was
retrieved when you performed Section: 6.
Retrieving Calibration Information From Global
A Vehicles Using GDS 2 – This Action is
Required for ALL Service Agents (Model
Dependent)
3. Go to Section: 10. Procedure for ALL Service
Agents for E-mailing .jpg or JPEG Files to the
Calibration Group at — TACCVN@gm.com .
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10. Procedure for ALL Service Agents
for E-mailing .jpg or .jpeg Files to the
Calibration Group at —
TACCVN@gm.com
Notice:
1. ALL screen shots MUST be sent as a .jpg or
.jpeg file. Keep all photos in ONE e-mail.
2. DO NOT e-mail photos from the GDS 2 in the
automatic format of a .png file. Your e-mail will
arrive at the Calibrations Group with the .png
file(s) having been stripped by the security
firewall.
1. Create an e-mail to be sent to: TACCVN@gm.com
2. Attach the Tech 2® digital .jpg photos or the GDS 2
.jpg photos to the e-mail. Keep ALL photos in one
e-mail.
3. In the Subject Line of the e-mail include the
following:
3.1. The phrase: “V6 Cal”, “V8 Cal” or
“4-Cyl Cal”
3.2. The complete: VIN
3.3. The Service Agent BAC
4. In the Body of the e-mail include the following:
4.1. The complete: VIN
4.2. The Mileage
4.3. The Service Agent BAC
4.4. The Technician / Service Manager Name
4.5. The Return email Address
4.6. The Repair Order (R.O.) or Job Card
number
4.7. The Customer Complaint
4.8. The Cause of the Condition
4.9. Any Modifications noted
Notice: Requests that are sent to the Calibrations
Group are handled in the order in which they were
received.
5. The Service Agent will receive an e-mail reply after
the calibrations have been validated. The e-mail
reply will advise the Service Agent if the
calibrations are OEM.
⇒ If non-GM ECM calibrations are determined to
be present, the Calibrations Group will forward
the case to the appropriate Brand Quality
Manager for review. The Brand Quality
Manager will then determine whether the
warranty will be blocked and will respond to all
parties concerned.
6. You may call the PQC two hours after submitting
the e-mail to the Calibrations Group (or after the
results have been received by e-mail) for
authorization to replace the assembly. This time
allows the Calibrations Group to receive, review,
verify the calibrations and set up a case for the
request. The Calibrations Group will also update
the PQC or TAC case with the results of the
Calibration Verification Request.
Be prepared to provide all the usual documentation
that is normally required when requesting an
assembly authorization from the PQC.
Notice: DO NOT contact GM Technical Assistance
(TAC) to discuss warranty concerns on the non-GM
calibrations. ALL questions and concerns about
warranty should be directed to the District Manager
Aftersales (DMA), in Canada the DM-CCSP (District
Manager-Customer Care and Service Process).
11. Calibrations Group – New E-mail
Address – TACCVN@gm.com
The Calibrations Group has a new e-mail address to be
used when mailing the digital .jpg or .jpeg photographs
of the Engine Calibration ID and Verification No.
(Number) Information taken from the Tech 2® or .jpg or
.jpeg photographs from the GDS 2 Calibration History
screen shot.
E-mail all .jpg or .jpeg files to this address:
TACCVN@gm.com
12. Warranty Information
• The Dealership Service Management must be
involved in any situation that would justify the use
of labor operation 0600014.
• Notify the District Manager Aftersales (DMA), in
Canada the DM-CCSP (District
Manager-Customer Care and Service Process) of
the situation.
• 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

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