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 closer look at DEF contamination in diesel […]
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 TechLink 2026 Engine Oil Capacities chart is now available under the Reference Charts menu. The chart includes engine, RPO, specifications (liters and quarts), oil viscosity and engine oil filter […]
To help gather product feedback on the new 2026 Corvette ZR1X (Fig. 4), an Action Center has been established by the GM Technical Assistance Center (TAC) for U.S. dealerships […]
A blank or black screen display affecting the instrument cluster, infotainment screen, or both, on some 2022-2026 Silverado, Tahoe, Suburban, HUMMER EV, Sierra, Yukon; 2024-2025 XT4; 2024-2026 Encore GX, Envision, […]
The Lunch with Your Field Service Engineers monthly meetings (U.S. only) held online via Microsoft Teams offer GM dealership technicians, shop foremen and service managers the latest technical information and […]
Digital key is a new convenience feature that allows a customer to use a compatible smart device, such as a smartphone or smartwatch, in place of a conventional key or […]
Key cards are wallet-sized cards that can be used to unlock, lock and start a number of GM vehicles when the key fob is not available. Key cards may be […]
The numbers are staggering. The new 2026 Corvette ZR1X produces a combined 1,250 horsepower from its 5.5L twin-turbocharged V8 engine (RPO LT7) and front electric drive unit. The result is […]
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 […]
IMPORTANT: The CX Connect release will now be available on Thursday, January 22nd. We appreciate your patience and understanding in this matter. The latest CX Connect release (January 2026) includes […]
The monthly GM Service Know-How Emerging Issues seminars provide service/technical information on current issues and GM-certified repairs. This month the seminar looks at the Corvette brake systems and provides some […]
The E01 Engine Control Module (ECM) for 2022-2026 CT4, CT5, Silverado, Sierra; 2023-2025 Envision; 2023-2026 Colorado, Canyon; and 2024-2025 XT4 models equipped with the 2.0L engine (RPO LSY) or 2.7L […]
There may be a squeal or tick (rotational type noise) heard coming from the front brake calipers when the brakes are not applied on some 2023-2026 Colorado and Canyon trucks. […]
New Belt Drive Rack and Pinion Steering Power Pack Replacement
Unable to Learn Tire Pressure Monitor Sensors
1.3L Engine Coolant Control Valve Failure
Fuel Injection Pump Installation and Diesel Engine Timing
High Resistance on Grounds G103A, G103B
My Open Cases List View Issue in CX Connect
Making Associated Accessory Warranty Claims
TAC and TCSC Phone Support to Require CX Connect Case Number
Vehicle-Wide Programming Update for EVs
Fuel Pump Power Control Module Internal Short
GM Service Know-How Emerging Issues
Guided Diagnostics – The Next Step in a More Focused Repair Path
Service Door Latch Message and Child Safety Lock Condition
Aftermarket Lighting, Sensor Obstruction May Cause False Front Park Assist Alerts
Oil Pan Wiring Harness Diagnostic TipsTAC Newsletter August 2026
TAC Newsletter April 2026
DCA-8000
Troubleshooting
Guide
MDI-2 Connections and Advanced Setup 2026
CX Connect Case Creation Help + Tips and Tricks
GM has recently established a new air conditioning refrigerant leak diagnostic procedure for GM EVs and PHEVs — including the Silverado EV, Blazer EV, Equinox EV, Bolt EV/EUV, Corvette E-Ray, […]
The latest update to GDS 2 in Techline Connect provides technicians with the ability to build personalized data parameter lists tailored for specific diagnostic sessions — identifying only the data […]
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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