TechLink

TCSC Top Issues This Week

The Techline Customer Support Center (TCSC) is available to help dealerships with diagnostic and programming issues related to Techline Connect (TLC) and the Service Programming System (SPS). TCSC has now […]

February 6, 2026 —

Safety Arc-Rated Personal Protection Equipment for Electric Vehicles

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 […]

January 29, 2026 —

Engine Oil Capacities Chart for the 2026 Model Year

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 […]

January 29, 2026 —

2026 Corvette ZR1X TAC Action Center

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 […]

January 29, 2026 —

Blank Screen Display Diagnostic Tips

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, […]

January 29, 2026 —

Harsh Garage Shift into Drive or Reverse

A harsh garage shift into Drive or Reverse may be noticed on some 2025-2026 Envista and Trax models equipped with the 6T40 automatic transmission (RPO MNK, MNH). The shift issue […]

January 29, 2026 —

Make a Reservation to Meet with Your FSEs in 2026

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 […]

January 21, 2026 —

GM Introduces Digital Key, Offering Convenience and Easy Access

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 […]

January 16, 2026 —

Key Cards Put Vehicle Access in Your Wallet

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 […]

January 16, 2026 —

New 2026 Corvette ZR1X Delivers Twin-Turbo AWD Hypercar Performance

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 […]

January 16, 2026 —

MDI 2 Manager Update Adds Support for New Wireless Dongles

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 […]

January 16, 2026 —

Latest CX Connect Update Delivers Streamlined Operation and Enhanced Search Functions

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 […]

January 16, 2026 —

GM Service Know-How Emerging Issues

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 […]

January 16, 2026 —

Engine Control Module Diagnosis and ECM Part Restriction

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 […]

December 23, 2025 —