The 2025 ESCALADE IQ, the first-ever all-electric full-size SUV from Cadillac, redefines the luxury SUV experience with an Ultium Platform delivering a Cadillac-estimated 460 miles of range, vehicle-to-home bidirectional charging […]
There may be a vibration or rattle sound in the body of the vehicle on some 2025 Equinox models. The vibration or rattle may be more noticeable under light load, […]
The high-voltage (HV) battery in 2022-2025 HUMMER EV; 2023-2025 BrightDrop, LYRIQ; 2024-2025 Blazer EV, Equinox EV, Silverado EV and Sierra EV models requires updated Battery Energy Control Module (BECM) calibrations […]
Multi-Factor Authentication (MFA) — an identity verification process that requires at least two methods of authentication, such as a password and a temporary passcode, to verify a user’s identity — […]
If an error occurs when launching the Techline Connect (TLC) application, the first solution is often to try to restart TLC. If the application still does not start correctly, it […]
Electric Vehicles (EVs) feature a number of electronic control modules that may require software updates. These updates are important to not only resolve operating issues, but also to enhance vehicle […]
There may be a GCW Overweight message displayed on the Driver Information Center of some 2022-2025 Silverado 1500, Sierra 1500; and 2024-2025 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with […]
Due to a recent update of the Google Maps application, an issue may arise in which the infotainment system (RPO IOK, IVD, IVE) has a persistent “Offline” icon in maps […]
The monthly GM Service Know-How Emerging Issues seminars provide service/technical information on current issues and GM-certified repairs. This month the seminar takes a first look at the all-new 2025 Escalade […]
There may be low oil pressure in the 5.3L V8 engine (RPO L84) or 6.2L V8 engine (RPO L87) on some 2019-2024 Silverado 1500, Tahoe, Suburban, Sierra 1500, Yukon; and […]
The Diesel Exhaust Fluid (DEF) tank may appear to be empty shortly after beginning a towing trip or it may be difficult to properly fill the DEF tank on some […]
The latest diagnostic assistance from the professionals at the GM Technical Assistance Center is now available in the October GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
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 […]
Harsh Garage Shift into Drive or Reverse on Envista and Trax Models
Safety Arc-Rated Personal Protection Equipment for Electric Vehicles
Engine Oil Capacities Chart for the 2026 Model Year
2026 Corvette ZR1X TAC Action Center
Blank Screen Display Diagnostic Tips
Make a Reservation to Meet with Your FSEs in 2026
GM Introduces Digital Key, Offering Convenience and Easy Access
Key Cards Put Vehicle Access in Your Wallet
New 2026 Corvette ZR1X Delivers Twin-Turbo AWD Hypercar Performance
MDI 2 Manager Update Adds Support for New Wireless Dongles
Latest CX Connect Update Delivers Streamlined Operation and Enhanced Search Functions
GM Service Know-How Emerging Issues
Engine Control Module Diagnosis and ECM Part Restriction
Front Brake Caliper Sound and Uneven Pad Wear
3rd-Row Seat Switch Diagnosis
Check Ground Terminals for Transmission Fluid Temperature Sensor Circuit Condition
December Service Newsletter from the Experts at GM TAC
FSE Technician Recognition Awards – 4th Quarter 2025DCA-8000
Troubleshooting
Guide
TAC Newsletter February 2026
TAC Newsletter January 2026
Techline Connect Tips November 2024
CX Connect Case Creation Help + Tips and Tricks
Safety Arc-Rated (AR) Personal Protection Equipment (PPE) is recommended to be used by technicians when servicing some high-voltage battery packs under certain scenarios on GM electric vehicles. The PPE that […]
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. […]
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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