TechLink – Page 2

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 —

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 —

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. This month the seminar highlights diagnostic tips for the power hood on Silverado […]

March 17, 2026 —

Harsh Garage Shift into Drive or Reverse on Envista and Trax Models

A harsh garage shift into Drive or Reverse may be noticed on some 2025-2026 Envista and Trax models equipped with the 6T40 automatic transmission (RPO MNK, MNH). The shift issue […]

March 9, 2026 —

Intermittent Front Lighting Operation

The headlamps, Daytime Running Lamps (DRL), parking lamps and/or turn signals may be intermittently inoperative on some 2024-2026 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks. (Fig. 1) Lighting operation may recover […]

February 28, 2026 —

Loss of Reverse/Forward Grid Lines in Camera View

Some 2022-2026 Silverado 1500, Sierra 1500; 2024-2026 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD models equipped with the Surround Vision Cameras may have a front-view or rear-view camera display (Fig. 4) that […]

February 28, 2026 —

Inoperative Heated and Ventilated Front Seats

The driver’s and front passenger’s heated and ventilated seats may be inoperative on some 2021-2026 XT5 and XT6 models. (Fig. 7) Fuse F19RA also may be open. These conditions may […]

February 28, 2026 —