A 2025 Full-Size SUV Action Center for U.S. dealerships has been established by the GM Technical Assistance Center (TAC) to provide feedback on the new 2025 Tahoe, Suburban, Yukon and […]
GM has recently begun moving authentication for several applications, including Service Workbench and Techline Connect, to Microsoft Azure, which offers additional security, a variety of application development tools and an […]
The Techline Connect (TLC) browser launch page (Fig. 3) for users in several U.S. states was updated recently to improve overall application stability, allow for faster updates and enhance resolution […]
GM EV customers with a GM-approved North American Charging Standard (NACS) DC adapter now have access to more than 17,800 Tesla Superchargers throughout the U.S. and Canada to quickly charge […]
The power hood, (eTrunk™), available on the 2022-2025 HUMMER EV Pickup; 2024-2025 HUMMER EV SUV; 2024-2025 Silverado RST EV; and 2024-2025 Sierra Denali EV offers secure storage in the front […]
Some 2025 Corvettes may have an excessive squeal or squeak sound from the front brakes. (Fig. 16, optional equipment shown) The sound normally only occurs on initial brake applications after […]
The latest Original Equipment (OE) Battery Ratings chart for the 2025 model year is now available under the Reference Charts menu for use when testing OE batteries. (Fig. 1) […]
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, […]
An engine coolant leak may be noticed on the ground or on the front of the engine after the vehicle has been parked for a while on some 2023-2024 Corvette […]
The GM Field Service Engineer (FSE) Technician Recognition Awards (U.S.) celebrate the skill and dedication of dealership technicians who have recently worked with FSEs on challenging repairs. Technicians at GM […]
The monthly GM Service Know-How Emerging Issues seminars provide service/technical information on current issues and GM-certified repairs. This month the seminar looks at sunroof sunshade repair. (Fig. 16) Fig. […]
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 […]
GM and Bosch Diagnostics continue to find counterfeit MDI and MDI 2 tools (Fig. 5) available to the aftermarket through several online websites. These tools appear very authentic from their […]
Certified Class “0” insulating gloves rated at 1000V with leather protectors (Fig. 6) provide an insulative barrier between an electrical point and the skin of an individual, and are required […]
The updated TechLink Engine Oil Capacities chart for the 2024 model year is now available under the Reference Charts menu. The chart includes engine, RPO, specifications (liters and quarts), oil […]
The latest diagnostic assistance from the professionals at the GM Technical Assistance Center is now available in the September GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
Water Leak on Front Passenger Floor
Power Lines Affecting Electrical System of Upfitted Vehicles
Search TAC Resolutions in CX Connect
GM Service Know-How Emerging Issues
Inoperative Sunroof Due to Air Deflector Clips
Headlamp Cooling Fan Humming Sound
September Service Newsletter from the Experts at GM TAC
Faster Case Response Times in CX Connect
Ground Fault at the Transmission Case
Sunshade Lamp Supply Circuit Draw
Transmission Park Lock Valve Parts Released
Automatic Transmission Fluid Appearance and ColorDCA-8000
Troubleshooting
Guide
TAC Newsletter October 2025
TAC Newsletter September 2025
Techline Connect Tips November 2024
CX Connect Case Creation Help + Tips and Tricks
The latest Original Equipment (OE) Battery Ratings chart for the 2026 model year is now available under the Reference Charts menu for use when testing OE batteries. (Fig. 5) […]
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 […]
Take a detailed look at a wide range of innovative features and advanced systems found on GM vehicles to gain a better understanding of proper operation. Each short video reviews how a feature works, highlights operating tips and shows ways to customize settings, if applicable.
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