Some 2012-2019 Cruze; 2012-2020 Regal; and 2012-2025 Malibu, Equinox and Terrain models may experience low or reduced power under acceleration. DTCs P057B (Brake Pedal Position Sensor Performance), P057C (Brake Pedal […]
After replacing a module on a GM model equipped with the Vehicle Intelligence Platform (VIP), several possible concerns may occur. These include: Serial Data Authentication Configuration fails to complete. DTC […]
The latest diagnostic assistance from the professionals at the GM Technical Assistance Center is now available in the August GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
The new CX Connect platform (U.S. only), the dealer-facing case system that replaces Dealer Self-Service (DSS) and Advisor Workbench/Siebel, changes how technicians manage all case types to the Technical Assistance Center […]
As Over-the-Air (OTA) updates and Vehicle-Wide-Programming become more commonplace on GM vehicles, a new diagnostic strategy is being implemented to better address performance concerns related to control module updates and […]
The center console compartment release button on some 2023-2025 Corvette models (Fig. 3) may become stuck in the depressed position or may extend out of the console compartment. If these […]
While driving into direct sunlight or under street lights at night, some drivers of 2024-2025 Equinox EV models (Fig. 7) may notice glare from the dash reflected onto the windshield. […]
In an effort to get the most useful information to dealerships, the GM Technical Assistance Center (TAC) has released an updated list of organizational contacts for service departments. (Fig. 12) […]
The monthly GM Service Know-How Emerging Issues seminars provide service/technical information on current issues and GM-certified repairs. This month the seminar reviews how to diagnose HVAC leaks. (Fig. 13) […]
The launch of CX Connect, GM’s new Dealer Case Management system (U.S. only), is just around the corner, going live on August 11, 2025. The new CX Connect platform (Fig. […]
The rollout of the Techline Connect and GDS2 split update continues this week. On August 6, 2025, changes to the way GDS2 operates was released to all GM dealerships in […]
The fluorescent dye installed in the air conditioning refrigerant system of all current GM vehicles helps in locating leaks in the A/C system. Using the GE-42220 Universal 12V Leak Detection […]
There may be a loss of air conditioning, weak cooling or warm air coming out of the vents on some 2024-2025 Silverado 1500 and Sierra 1500 trucks. These conditions may […]
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 […]
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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