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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
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 […]
Harsh Garage Shift into Drive or Reverse on Envista and Trax Models
Intermittent Front Lighting Operation
Loss of Reverse/Forward Grid Lines in Camera View
Inoperative Heated and Ventilated Front Seats
Brake Pad Wear Sensor Contact with Rear Half Shaft
February Service Newsletter from the Experts at GM TAC
The 2027 Chevrolet Bolt Makes Its Comeback
2027 Chevrolet Bolt TAC Action Center
NACS and CCS1 Charging Adapter Options
February CX Connect Release Provides Multiple App Updates
GM Service Know-How Emerging Issues
Safety Arc-Rated Personal Protection Equipment for Electric Vehicles
Engine Oil Capacities Chart for the 2026 Model Year
2026 Corvette ZR1X TAC Action Center
Blank Screen Display Diagnostic TipsDCA-8000
Troubleshooting
Guide
TAC Newsletter February 2026
TAC Newsletter January 2026
Techline Connect Tips November 2024
CX Connect Case Creation Help + Tips and Tricks
Safety Arc-Rated (AR) Personal Protection Equipment (PPE) is recommended to be used by technicians when servicing some high-voltage battery packs under certain scenarios on GM electric vehicles. The PPE that […]
The latest update to the MDI 2 Manager in Techline Connect (version 9.1.2752.177) includes support for new MDI 2 wireless dongles. The new wireless dongles are similar to the previously […]
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.
Designed by WPZOOM
