The September Techline Connect (TLC) software release includes several updates to enhance the performance of the application. The update should be downloaded automatically when logging in to Techline Connect. (Fig. […]
When an Over-the-Air (OTA) update has been downloaded to a 2021-2024 Chevrolet, Buick, GMC or Cadillac vehicle and is available to be installed, a message is displayed on the infotainment […]
The Techline Customer Support Center (TCSC) has released their latest tips for Techline Connect and the Service Programming System. The tips — included in the easy-to-print PDF below — cover […]
After an Over-the-Air (OTA) software update on some 2021-2022 Corvette and 2022 Envision models, the radio may not turn off after the vehicle’s ignition has been turned off and the […]
The Vehicle Intelligence Platform (VIP) electrical architecture continues to power a growing number of new GM vehicles for the 2023 model year. The VIP architecture offers enhanced capacity and the […]
The new GM Dealer Infrastructure & Security Guidelines (DISG) are now available to help dealers with the technology needed to ensure reliable data communications, including recommended personal computer (PC) specifications. […]
Technicians navigating in Service Information (SI) using the year, make and model (YMM) of a vehicle are used to seeing all service manual content for that vehicle displayed — that […]
A wireless network in the dealership service department offers the freedom of connecting a variety of devices without being tethered by wires. But wireless networks have limits since, in a […]
The Multiple Diagnostic Interface 1 & 2 (MDI/MDI 2) are designed to connect a vehicle to a host PC computer application for data transfer and Electronic Control Unit (ECU) reprogramming. […]
The March Techline Connect (TLC) software release includes several updates to aid navigation in the app as well as enhance screen formatting. The update should be downloaded automatically when logging […]
The latest GDS2 core update release (v22.2.05000) includes an update to the J2534 Wrapper, or MDI tool selection window. Since the MDI no longer receives updates to its core software, […]
After installing a number of select GM Genuine Accessories (Fig. 16), a calibration update from the Techline Customer Support Center (TCSC) is required in order to complete the installation properly. […]
In order to ensure successful and complete repairs are made when reprogramming control modules, GM reviews module reprogramming warranty claim information and compares it to Service Programming System (SPS) reprogramming […]
The Chevrolet Performance, GMC and Cadillac Cold Air Intake System (RPO 5W7, RVK) available on 2021 Camaro, Silverado, Tahoe, Suburban, Sierra, Yukon and Escalade models equipped with the 5.3L V8 […]
Programming calibrations and software requires the transfer of large files to the vehicle from the Service Programming System (SPS). When transferring a large file (greater than 1 GB) from the […]
Over-the-Air (OTA) software updates (Fig. 1) that are pushed to vehicles remotely continue to expand in frequency and use on GM models. Vehicles using the Global A electrical architecture can […]
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 Color
New Firewall Exclusions, Windows 10 Support Removed in Latest Dealer Infrastructure & Security Guidelines Update
Incomplete Radio Registration Prevents Owner’s Manual Download
New 12V Battery Ratings Chart for the 2026 Model Year
GM Service Know-How Emerging Issues
Enhancing Diagnostic Accuracy with Thermal Imaging — New Essential Tool Shipping to Dealerships
EV Reduced Acceleration Conditions
Incorrect Brake Pedal Position Sensor Signal Input
Serial Data Authentication Configuration After Programming a Control Module
August Service Newsletter from the Experts at GM TACDCA-8000
Troubleshooting
Guide
TAC Newsletter October 2025
TAC Newsletter September 2025
Techline Connect Tips November 2024
CX Connect Case Creation Help + Tips and Tricks
Thermal imaging was once reserved for specialty diagnostics, but it’s now becoming an accessible and valuable tool in dealership service bays. The GM-60503 Thermal Imaging Camera, a new GM Essential […]
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 […]
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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