The aero shutters on some 2019-2021 Silverado 1500, Tahoe, Suburban, Sierra 1500, Yukon, Escalade; 2020-2021 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD models may have several conditions that could potentially cause improper […]
The GM Field Service Engineer (FSE) Technician Recognition Awards (U.S.) celebrate the skill and dedication of dealership technicians who have recently worked with FSE’s on challenging repairs. Technicians at GM […]
There may be possible moisture or condensation freezing in the crankcase pressure sensor assembly on some 2019 CT6; 2019-2022 XT4; 2020-2022 CT4, CT5, XT5, XT6, Blazer, Acadia; and 2021-2022 Envision […]
Service department personnel and fleet managers looking to record odometer and engine hour values from new 2022 Silverado 1500 and Sierra 1500 models equipped with the base instrument cluster (RPO […]
Some four-wheel drive 2020-2022 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 10-speed automatic transmission (MGM, MGU) and transfer case MP 3023/2024 (RPO NQH) may have a Service 4WD […]
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 […]
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 […]
The GM Warranty Parts Center (WPC) has introduced a new part photo return process for parts replaced under warranty (U.S. only). The new process can help reduce the cost and […]
In the new Technician Excellence Program (U.S.), enrolled GM dealership service technicians can earn quarterly earnPOWER points based on their certifications across 11 service categories. (Fig. 6) Technicians are recognized […]
The GM Technical Assistance Center, or TAC, (U.S.) has established an Action Center for the all-new 2022 HUMMER EV. (Fig. 8) Fig. 8 TAC Action Centers are designed […]
The Super Cruise hands-free driver-assistance technology (RPO UKL) is now available on 2021-2022 Escalade, CT4, CT5; 2022 XT6, Bolt EUV, Silverado 1500, Sierra 1500 and HUMMER EV Pickup. The advanced […]
Some 2021-2022 Corvettes equipped with the Z51 Performance Package (Fig. 1) may have a brake pulsation or grinding sound when applying the brakes. There also may be a pitting condition […]
After replacing the wiring harness on the Diesel Exhaust Fluid (DEF) tank on some 2020-2022 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine (RPO L5P), […]
The power liftgate actuators (Fig. 7) from some 2018-2022 Acadia, XT5 and 2020-2022 XT6 models that have been returned to the Warranty Parts Center show damage due to improper removal. […]
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 2025
Enroll Today in the 2026 Technician Excellence Program
Verify Vehicle Settings After Rocker Panel Ground Lamps Installation
Heated Steering Wheel Replacement
Door Panel Wood Trim Condition
GM Service Know-How Emerging IssuesDCA-8000
Troubleshooting
Guide
TAC Newsletter January 2026
TAC Newsletter December 2025
Techline Connect Tips November 2024
CX Connect Case Creation Help + Tips and Tricks
All buttons on one key fob (Remote Keyless Entry transmitter) may be inoperative on some 2023-2026 Escalade, LYRIQ, Corvette, Silverado 1500, Silverado 2500HD/3500HD, Tahoe, Suburban, Sierra 1500, Sierra 2500HD/3500HD, Yukon; […]
To avoid wait times for technical support in the dealership, prior to contacting the GM Technical Assistance Center (TAC) and Techline Customer Support Center (TCSC) as well as and other […]
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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