Some 2024-2026 Chevrolet 5500 HG/5500 XG Low Cab Forward (LCF) models equipped with the 6.6L V8 engine (RPO L8T) and 6-speed Allison automatic transmission (RPO MW7) may have several DTCs […]
The latest diagnostic assistance from the professionals at the GM Technical Assistance Center is now available in the December GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
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 […]
Designed to recognize and reward dealership technicians for their technical training achievements, the Technician Excellence Program (U.S.) has kicked off enrollment for the 2026 program year. Enrollment takes place through […]
The GM Accessory Rocker Panel Molding Ground Lamps (PN 85155377) may not illuminate after installation on some 2024-2026 Silverado EV and Sierra EV models. (Fig. 3) Fig. 3 The exterior […]
Before replacing the heated steering wheel on some 2021-2022 CT4, CT5; 2022 Enclave, XT5, XT6, Blazer, Silverado 1500 LTD, Silverado 2500HD/3500HD, Tahoe, Suburban, Traverse, Acadia, Sierra 1500 Limited, Sierra 2500HD/3500HD, […]
Some 2022-2025 Silverado 1500, Sierra 1500; 2024-2025 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks may have a bubbling or delaminating condition on the wood trim of the door panel. (Fig. 10) […]
The monthly GM Service Know-How Emerging Issues seminars provide service/technical information on current issues and GM-certified repairs. This month the seminar takes a look at how to correct outside door […]
The latest diagnostic assistance from the professionals at the GM Technical Assistance Center is now available in the November GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
The Labor Time Group is responsible for warranty repair time studies, accessories and Pre-Delivery Inspections (PDI). Labor time studies are completed for new vehicles as well as new service procedures […]
There may be several audio system conditions on some 2022-2024 Tahoe, Suburban, Yukon; 2022-2025 HUMMER EV; 2022-2026 Silverado 1500, Sierra 1500; 2023 BrightDrop; 2024-2025 Corvette; 2024-2026 Silverado 2500HD/3500HD and Sierra […]
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; […]
The latest CX Connect release includes a number of enhancements and updates that are designed to increase the functionality of the app and make it easier to use. VIN […]
The new SAVI Manager v2.29.0 release provides an update to address USB driver failure. The latest release will correct the issue of the Quectal driver failing to install by automatically […]
Update – Midtronics DCA-8000 Diagnostic Charger is the Only Accepted Battery Tester for Warranty Battery Replacement (U.S.)
Rear Leaf Spring Noise and Possible Fuel Contamination
2027 Bolt State of Charge and NACS Charging Tips
Fuse F17UA and Possible No Start Condition
Inoperative PTO on Silverado Medium-Duty Trucks
Create Custom Data Lists in GDS 2
Updated Transfer Case Input Shaft Seal Installation
A/C Leak Detection Dye for EVs
When and Why to Use Fuel Additives
GM Service Know-How Emerging Issues
Check 55-Way Connector if Glow Plug DTCs are Set
Setting Up Wired and Wireless MDI 2 Connections
MDI 2 Advanced Setup Technical Tips Update
April Service Newsletter from the Experts at GM TACDCA-8000
Troubleshooting
Guide
TAC Newsletter April 2026
TAC Newsletter March 2026
MDI-2 Connections and Advanced Setup 2026
CX Connect Case Creation Help + Tips and Tricks
The new 1.2L engine (RPO LBP), introduced in the 2025 Envista, Encore GX, Trax and Trailblazer, features E85 compatibility. As part of the updates to the Evaporative Emission (EVAP) system, […]
With the MDI Manager application software, the MDI 2 can be configured to communicate with a PC using several possible networks, such as a USB cable, ethernet cable, Wireless Local […]
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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