Techline

Do Not Swap Control Modules

GM diagnostic strategy does not support the practice of swapping control modules during the course of diagnosis or to expedite a repair. Features in today’s vehicles are increasingly software configurable. […]

November 19, 2025 —

Faster Case Response Times in CX Connect

To avoid wait times for technical support in the dealership, prior to contacting the GM Technical Assistance Center (TAC) and Techline Customer Support Center (TCSC) as well as and other […]

September 26, 2025 —

New Firewall Exclusions, Windows 10 Support Removed in Latest Dealer Infrastructure & Security Guidelines Update

The latest GM Dealer Infrastructure & Security Guidelines (DISG) have been updated with recommended firewall exceptions for Techline Connect applications. (Fig. 1) The following exception has been added and needs […]

September 18, 2025 —

New Diagnostic Strategy: Reprogram Control Modules Before Replacement

As Over-the-Air (OTA) updates and Vehicle-Wide-Programming become more commonplace on GM vehicles, a new diagnostic strategy is being implemented to better address performance concerns related to control module updates and […]

August 22, 2025 —

SPS Events Soon to Require Hard-Wired Connection to MDI 2

As Service Programming System (SPS) events become larger in size and more frequent for all GM models, it’s important to ensure the most reliable connection method to the MDI 2. […]

June 17, 2025 —

Windows 10 Support Ending Soon

Microsoft has announced it will discontinue free support of the Windows 10 operating system (OS) on October 14, 2025. The Techline Customer Support Center (TCSC) will continue to support personal […]

June 17, 2025 —

Vehicle-Wide Programming Status Summary Now Includes All Control Modules

The Vehicle-Wide Programming (VWP) feature in Techline Connect (TLC) has been updated with several enhancements in the latest software release. VWP, which allows multiple control modules to be programmed during […]

May 30, 2025 —

MDI 2 Order Lead Times Update

The EL-52100 MDI 2 is required for control module programming, configuration and setup on GM vehicles equipped with the Vehicle Intelligence Platform (VIP) electrical architecture. (Fig. 2) Fig. 2 […]

March 12, 2025 —

Guidelines for Successful Installation of GM Accessories

Before installing a variety of GM Accessories, such as keyless entry, upsize wheels and tires, lights/cargo lamps and others, on GM vehicles, it’s important to check for vehicle compatibility, if […]

February 26, 2025 —

New 2024 Dealer Infrastructure & Security Guidelines Update Firewall Exclusions and SPS USB Requirements

With rapidly changing technology being utilized throughout the dealership environment, the GM Dealer Infrastructure & Security Guidelines (DISG) have been updated to help dealers maintain reliable data communications, establish security […]

November 26, 2024 —

Long TCSC Hold Times – Counterfeit MDI Devices

Recently, the Techline Connect Support Center (TCSC) has received a substantial increase in call volume. As the increase in calls drives up the wait time to talk to an agent, […]

October 10, 2024 —

Techline Customer Support Center Introduces Dealer Case Management Support

The Techline Customer Support Center (TCSC) has introduced Dealer Case Management (DCM) support for all inbound cases. The DCM system (U.S.) enables dealership technicians to create, view and update Techline […]

September 30, 2024 —

New Vehicle-Wide Programming for Software Updates

With its enhanced capacity and ability to manage technology complexity, the GM Vehicle Intelligence Platform (VIP) electrical architecture offers the capability of managing over 100 electronic control modules. When necessary, […]

August 23, 2024 —

Resolving Service Programming System Errors

There are several Service Programming System (SPS) errors that can be resolved by following some basic steps, and do not require replacing the control module, on 2000-2025 GM models. No […]

July 23, 2024 —