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 […]

April 2, 2026 —

Proactive Alerts — Parasitic Drain Detection

Proactive Alerts, a feature of OnStar Advanced Diagnostics, are designed to help predict specific types of potential performance degradation based on current vehicle data. New Proactive Alerts have been added […]

March 31, 2026 —

Proper Use and Diagnostic Tips for NFC Key Cards

Key cards are wallet-sized cards that can be used to unlock, lock and start a number of GM vehicles when the key fob is not available. Key cards (part of […]

March 31, 2026 —

Camshaft Position Sensor Performance Diagnosis

When diagnosing engine performance issues, DTCs P0340 (Intake/Single Camshaft Position Sensor Circuit), P0341 (Intake/Single Camshaft Position Sensor Performance), P0011 (Intake/Single Camshaft Position System Performance) or P0016 (Crankshaft Position Sensor and […]

March 31, 2026 —

Tick Sound at Idle on V8 Engines

The 5.3L, 6.2L and 6.6L V8 engines (RPO L84, L87, L8T) available in 2019-2026 Silverado 1500, Silverado 2500HD/3500HD, Tahoe, Suburban, Sierra 1500, Sierra 2500HD/3500HD, Yukon and Escalade models may have […]

March 31, 2026 —

March Service Newsletter from the Experts at GM TAC

The latest diagnostic assistance from the professionals at the GM Technical Assistance Center is now available in the March GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]

March 31, 2026 —

CCND Labor Codes Updated for Infotainment Audio and Screen Conditions

An update to Bulletin #22-NA-038 has been released that covers changes for several Customer Concern Not Duplicated (CCND) labor operations that address screen conditions and audio system issues on 2022-2027 […]

March 24, 2026 —

FSE Technician Recognition Awards – 1st 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 […]

March 24, 2026 —

Radiator Inlet Hose Coolant Leak

Some 2023-2026 Colorado and Canyon models may have a visible coolant leak from the upper radiator inlet hose connection or a low coolant level at the overflow reservoir. DTC P3075 […]

March 24, 2026 —

Sending GDS 2 Session Logs to TAC Using CX Connect

There are times when working on a case with the GM Technical Assistance Center (TAC) where a GDS 2 session log will be needed to help with diagnosis of an […]

March 24, 2026 —

Key Fob Synchronization Update

All buttons on one key fob (Remote Keyless Entry transmitter) may be inoperative on some 2023-2026 Escalade, LYRIQ, Corvette, Tahoe, Suburban, Yukon; 2024-2025 XT4; 2024-2026 BrightDrop, Envision, CT5, Colorado, Silverado […]

March 24, 2026 —

CT5-V Blackwing Precision Package Features High-Performance Cup Tires with Unique Appearance

The available Precision Package (RPO V8V) on 2025-2026 CT5-V Blackwing models is a track-focused chassis package that is designed to enhance the dynamic performance of the vehicle on the road […]

March 24, 2026 —

Lunch with Your FSEs Monthly Meeting

The monthly Lunch with Your Field Service Engineer meeting will take place March 18. The one-hour meeting will be held online via Microsoft Teams and offers GM dealership technicians, shop […]

March 17, 2026 —

New TAC Phone Prompts Help Speed Support to Dealerships

Starting March 18, 2026, GM TAC is launching a new phone prompt experience to help route calls from technicians seeking assistance more quickly. Fig. 2 Enter TAC Case […]

March 17, 2026 —