TechLink

TCSC Top Issues This Week

The Techline Customer Support Center (TCSC) is available to help dealerships with diagnostic and programming issues related to Techline Connect (TLC) and the Service Programming System (SPS). TCSC has now […]

July 8, 2026 —

Guided Diagnostics – The Next Step in a More Focused Repair Path

GM has recently introduced Guided Diagnostics, a VIN-specific diagnostic application designed to help technicians follow a more focused repair path that reduces dead ends and makes troubleshooting more efficient. At […]

June 30, 2026 —

Service Door Latch Message and Child Safety Lock Condition

A Service Door Latch System message may be shown on the Driver Information Center (DIC) of some 2025-2026 Tahoe, Suburban, Yukon and Escalade models. In addition, the rear child door […]

June 30, 2026 —

Aftermarket Lighting, Sensor Obstruction May Cause False Front Park Assist Alerts

The front Park Assist system may issue false alerts on the Driver Information Center on some 2023-2026 Silverado 1500, Sierra 1500; 2024-2026 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks when there […]

June 30, 2026 —

Oil Pan Wiring Harness Diagnostic Tips

Some 2023-2024 Equinox and Terrain models equipped with the 1.5L engine (RPO LSD) (Fig. 13) may have an illuminated Check Engine MIL and DTCs P0521 (Engine Oil Pressure Sensor Performance), […]

June 30, 2026 —

FSE Technician Recognition Awards – 2nd Quarter 2026

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 […]

June 30, 2026 —

Gemini OTA Update for Google built-in

Google Gemini brings AI assistance to 2022-2027 Chevrolet, Buick, GMC and Cadillac models equipped with Google built-in (RPO IVE, IVD, IOK) — approximately four million vehicles in the U.S. are […]

June 18, 2026 —

Information on 4WD Front Axle Disconnect DTCs Updated in SI

New Diagnostic Steps Added for 4WD Front Axle Disconnect DTCs C118D, C10BA, C116F and C119C GM Engineering has identified a previously missing connector interface that requires inspection and circuit verification […]

June 18, 2026 —

Unable to Learn Trailer TPM Sensors

It may not be possible to learn the Trailer Tire Pressure Monitor (TPM) sensors to some 2024-2026 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks or the TPMS pressure readings may not […]

June 18, 2026 —

New 2026 Model Year Transmission Fluid Capacities Chart

The latest TechLink reference chart is now available covering transmission fluid capacities for the 2026 model year. The 2026 Transmission Fluid Capacities chart can be viewed under the Reference Charts […]

June 18, 2026 —

GM Service Know-How Emerging Issues

The monthly GM Service Know-How Emerging Issues seminars provide service/technical information on current issues and GM-certified repairs. The June seminar (10226.06V – U.S.) takes an in-depth look at the Midtronics […]

June 18, 2026 —

Introducing GM Parts Connect

A Preview of the New Parts Catalog Coming Soon. GM dealership service and parts operations will soon see a significant shift in how parts are identified, cataloged, and integrated into […]

June 18, 2026 —

Latest Techline Connect Update Adds Proactive Alert for Parasitic Drains to Dashboard

The latest Techline Connect update, released on June 15, 2026, includes an enhancement to the dashboard view showing a new Proactive Alert for potential parasitic drains. (Fig. 16) Fig. […]

June 18, 2026 —

Lunch with Your FSEs June Meeting

The monthly Lunch with Your Field Service Engineers meeting will take place June 17. The one-hour meeting will be held online via Microsoft Teams and offers GM dealership technicians, shop […]

June 9, 2026 —