Some 2022 Bolt EV and Bolt EUV models (Fig. 16) may have a “Service Transmission, Unable to Shift” message or “Service Transmission Now, Unable to Shift Soon” message displayed on […]
The July 2022 update to the GM Global Electronic Parts Catalog (EPC) includes a number of new features that add to the functionality of the EPC, making parts searches easier […]
Various unproven products over the years have claimed to improve vehicle fuel economy. Many of these product benefits are based on unsubstantiated claims. In fact, the U.S. Federal Trade Commission […]
The new 2022 Chevrolet Silverado 1500 (Fig. 9) and GMC Sierra 1500 offer a number of enhancements as part of a mid-year launch. The updated models feature new designs — […]
The GM Technical Assistance Center, or TAC, (U.S.) has established an Action Center for the all-new 2023 Cadillac LYRIQ EV. (Fig. 16) Fig. 16 TAC Action Centers are […]
The latest diagnostic assistance from the professionals at the GM Technical Assistance Center is now available in the July GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
The monthly GM Service Know-How Emerging Issues seminars provide service/technical information on current issues and GM certified repairs. The latest service topics from GM Brand Quality and Engineering covered in […]
A wireless network in the dealership service department offers the freedom of connecting a variety of devices without being tethered by wires. But wireless networks have limits since, in a […]
Some 2020-2022 Encore GX and 2021-2022 Trailblazer models may have a squealing sound originating from the front of the vehicle during light brake pedal application. (Fig. 5) The sound may […]
The 2019-2022 Silverado 1500, Sierra 1500; 2020-2022 Silverado 2500HD/3500HD, Sierra 2500HD/3500HD; and 2021-2022 Tahoe, Suburban, Yukon and Escalade offer a number of systems designed to help make towing easy. (Fig. […]
The Air Leveling Suspension (RPO F47) and the Electronic Suspension Control System (RPO Z95) are available on 2021-2022 Tahoe, Suburban, Yukon and Escalade models. When servicing these systems, it’s important […]
Some 2017-2019 Bolt EVs may have an intermittent click sound at the front of the vehicle and the ABS, traction control and/or StabiliTrack warning lamps may illuminate on the instrument […]
In the first quarter of the Technician Excellence Program (U.S.), more than 9,000 enrolled technicians earned rewards. The first quarter payouts are scheduled for the week of July 18th. […]
There may be a Hood Ajar message displayed on the Driver Information Center on some 2014-2020 Impala models with the hood completely closed. The Check Engine MIL may be illuminated […]
Harsh Garage Shift into Drive or Reverse on Envista and Trax Models
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 Tips
Make a Reservation to Meet with Your FSEs in 2026
GM Introduces Digital Key, Offering Convenience and Easy Access
Key Cards Put Vehicle Access in Your Wallet
New 2026 Corvette ZR1X Delivers Twin-Turbo AWD Hypercar Performance
MDI 2 Manager Update Adds Support for New Wireless Dongles
Latest CX Connect Update Delivers Streamlined Operation and Enhanced Search Functions
GM Service Know-How Emerging Issues
Engine Control Module Diagnosis and ECM Part Restriction
Front Brake Caliper Sound and Uneven Pad Wear
3rd-Row Seat Switch Diagnosis
Check Ground Terminals for Transmission Fluid Temperature Sensor Circuit Condition
December Service Newsletter from the Experts at GM TAC
FSE Technician Recognition Awards – 4th Quarter 2025DCA-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 […]
GM diagnostic strategy does not support the practice of swapping control modules during the course of diagnosis or to expedite a repair. Features in today’s vehicles are increasingly software configurable. […]
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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