NHTSA ID Number: 11032516
Manufacturer Communication Number: IK2700129
TSB/Document Date: 2026-05-08
Summary
This article provides step-by-step guidance for troubleshooting issues with Techline Connect software.
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Title : Techline Connect (TLC) General Troubleshooting Steps
Applies To : Techline Connect / SPS2 / GDS2
CHANGE LOG
Please refer to the change log text box below for recent changes to this article:
04/22/2026 - Adjusted for admin rights process
06/24/2025 - Added link for Vehicle Programming Resource Center
06/04/2025 - Added Fix for MDI 2 Network Problems
01/07/2025 - Initial Article Release
DESCRIPTION
This article provides step-by-step guidance for troubleshooting issues with Techline Connect software.
Techline Connect (TLC) General Troubleshooting Steps
Techline Connect updates are released regularly, but sometimes they do not get applied to your specific installation and
may require extra steps.
Please follow all steps below, download all three files, save them to your computer, and run them in the order shown.
It is also necessary that the dealer confirm all Windows updates have been completed.
Steps
Description
1. Close TLC
Run the EZ-Tech Update Reporting Tool to verify admin access. This tool can be found
in the download center: IK2700065.
2. Verify Admin Access
If you need Admin rights on your EZ-Tech, please request it by opening a case file
with the EZ- Tech group by following the instructions located here: IK3000111.
3. Java Killer
This script ends all Java processes on your computer.
4. TLC Install
This script uninstalls and then reinstalls TLC software, including the updates.
5. TLC Auto Check
This tool checks your whitelist and firewall settings. See the Network Troubleshooting
section below for details.
GDS2 Install Diagnostic Packages
After installing or updating GDS2, diagnostic packages may be missing. These packages must be reinstalled before GDS2
can connect to a vehicle. Follow the steps below to install the diagnostic packages.
Steps
Images
1. Select
Manage
Diagnostic
Packages
at the top
right of the
screen.
2. Select
the
diagnostic
package
you want
to install,
then select
the Install
button.
Techline Connect Network Troubleshooting
To ensure Techline Connect functions properly, follow the required network configurations as outlined in Techline's Dealer
Infrastructure & Security Guidelines (DISG). All application updates and installations must be performed using a Windows
account with local administrative privileges.
Domain Whitelist
Requirements
galileo-api.ext.gm.com
gsitlc.ext.gm.com
tlc.gm.com
sps.gm.com
techline.gm-cdn.com
gspas-delivery.gmcdn.com
sps-info.gm.com
Required Internet Firewall Exceptions
C:\Program Files (x86)\TechlineConnect\tlc.exe
C:\Program Files (x86)\Techline Connect\jre\bin\javaw.exe
C:\Program Files (x86)\TechlineConnect\TDMWindowsService.exe
C:\Program Files (x86)\General Motors
\Tech2Win\bin\emulator.exe
C:\Program Files (x86)\GM MDI Software\GM MDI Manager\GM_MDI_Manager.exe
C:\Program Files (x86)\GM MDI Software\GM MDI Identification
Service\GM_MDI_Ident.exe
C:\Program Files (x86)\Bosch\VTX-VCI\VCI Software (GM)\VCI
Manager\GM_MDI_Manager.exe
C:\Program Files (x86)\Bosch\VTX-VCI\VCI Software (GM)\VCI Identification
Service\GM_MDI_Ident.exe
C:\Program Files (x86)\Vibe Programming\Cuw.exe
Diagnostic Tool
Download the diagnostic software to check your firewall exceptions: Download TLC Auto Check
Notes:
Even after adding the required domains to the whitelist, some sites may still appear unreachable. This tool is meant for
a quick visual check, not a complete solution. Exceptions are pulled from Techline's Dealer Infrastructure & Security
Guidelines. For questions about whitelisted domains, please contact your dealer's IT department.
Galileo-api.ext.gm.com is often down on the server side and may show unreachable inside the tool. This is normal.
MDI 2 Adapter Interferes with Internet
If you find that several of the websites from the above tool are unreachable when the MDI 2 adapter is plugged into your
computer's USB Port, unplug the adapter and run the tool again. If you now see a reachable status for the sites, you likely
have the following issue.
Issue:
Sometimes, when you plug in the Bosch MDI 2 adapter, Windows sees it as a wired network connection.
Even though it doesn't connect to the internet, Windows may still try to use it for network traffic.
This can cause problems like websites not loading or internal systems not working correctly.
That happens because Windows usually gives wired connections higher priority than Wi-Fi connections - even if they do not
actually lead anywhere.
Below you will find a tool to fix this issue for you. The tool for EZ-Tech computers will only run on verified EZ-Tech
computers and does not require admin access.
For all other computers or if the EZ-Tech tool does not work, use the second link.
Fix - Automatic for EZTech PC:
1. Connect the MDI 2 adapter to the computer's USB port.
2. If using an EZ-Tech computer, download the EZTech MDI2 Fix file from the link (no admin rights required).
3. Run the MDI2_Fix_Tool.exe file.
4. Check the black box for the "OK" messages to show the script completed successfully.
Fix - Automatic Non-EZTech PC:
1. Connect the MDI 2 adapter to the PC's USB port.
2. Download the Non-EZTech MDI2_Fix file from this link (this tool requires admin rights).
3. Open the Zip folder and right-click MDI2_Fix.bat - Run as administrator.
4. Check the black box for the "OK" messages to show the script completed successfully.
Verification:
1. Press Windows + R, type cmd and press Enter.
2. Type netsh interface ipv4 show interfaces and press Enter.
3. Look for an Ethernet adapter with a MET of 100.
Manually Fix Bosch MDI 2 Network Adapter
If the automatic fix above does not work, follow these steps to fix the issue manually.
1. Press Windows + R, type ncpa.cpl, and press Enter.
2. Identify the Bosch MDI 2 Adapter. (If you are unsure, right-click each adapter and choose Status, then click Details to check the
Description.)
3. Right-click the Ethernet Adapter for Bosch MDI 2 and select Properties.
4. In the list, select Internet Protocol Version 4 (TCP/IPv4) and select Properties.
5. Select Advanced.
6. Uncheck Automatic metric.
7. Enter 100 in the Interface metric box.
8. Select OK to save and close all windows.
9. Verify the change using the verification steps above.
OTHER RESOURCES
Master Service Information Site
RC2600001 - Vehicle Programming Resource Center
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TSB/Document ID: IK2700129
Replacement Service Bulletin Number:
MFR Communication Date: 2026-04-23
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
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