Recovery of Failed USB Radio Programming
If an error occurs during USB radio programming on some 2017-2018 CTS; 2018 ATS, XTS and Terrain models equipped with infotainment system RPOs IOS, IOU or IOT, an “Update failed. […]
If an error occurs during USB radio programming on some 2017-2018 CTS; 2018 ATS, XTS and Terrain models equipped with infotainment system RPOs IOS, IOU or IOT, an “Update failed. […]
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 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
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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