TechLink – Page 7

Windows 10 Support Ending Soon

Microsoft has announced it will discontinue free support of the Windows 10 operating system (OS) on October 14, 2025. The Techline Customer Support Center (TCSC) will continue to support personal […]

June 17, 2025 —

Multiple DTCs Set Due to Wiring Harness Damage

There may be multiple DTCs set on some 2025 Silverado 1500, Tahoe Suburban, Sierra 1500 and Yukon models equipped with the 3.0L diesel engine (RPO LZ0). The DTCs, including many […]

June 17, 2025 —

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 reviews loss of propulsion conditions on the L87 engine. […]

June 17, 2025 —

Vehicle-Wide Programming Status Summary Now Includes All Control Modules

The Vehicle-Wide Programming (VWP) feature in Techline Connect (TLC) has been updated with several enhancements in the latest software release. VWP, which allows multiple control modules to be programmed during […]

May 30, 2025 —

2025 Model Year Transmission Fluid Capacities Chart

A new TechLink reference chart is now available covering transmission fluid capacities. The 2025 Transmission Fluid Capacities chart can be viewed under the Reference Charts menu or by selecting the […]

May 30, 2025 —

Key Fob Learning on 2025 Police and Special Service Vehicles

The 2025 Tahoe can be equipped with special service vehicle packages for police use (RPO 9C1) (Fig. 7; shown with aftermarket equipment) and special service use (RPO 5W4). Fig. […]

May 30, 2025 —

May Service Newsletter from the Experts at GM TAC

The latest diagnostic assistance from the professionals at the GM Technical Assistance Center is now available in the May GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]

May 30, 2025 —

First-Ever 2026 Cadillac VISTIQ Debuts

The first-ever all-electric 2026 Cadillac VISTIQ (Fig. 1) is now in production and hitting dealerships. Slotting between the LYRIQ and new ESCALADE IQ in Cadillac’s EV lineup, the VISTIQ delivers […]

May 22, 2025 —

New Rear Heating/Cooling System Provides 3rd-Row Comfort

The 2025-2026 ESCALADE IQ/IQL and VISTIQ feature a first-of-its-kind rear cabin heating/cooling system (RPO C69) for 3rd-row passengers. The separate HVAC system, controlled by using the Front Command Center touchscreen […]

May 22, 2025 —

Troubleshooting Tips for the DCA-8000P Diagnostic Charger

The GM DCA-8000P Diagnostic Charger – an Essential Tool for all U.S. dealerships – is the latest generation battery charger and tester from Midtronics that provides fast, accurate testing results. […]

May 22, 2025 —

New Part Number Released for Silverado and Sierra Half Shafts

A new half shaft part number has been released for 2019-2025 Silverado 1500 and Sierra 1500 trucks equipped with the Z71 Off-Road Suspension Package (RPO Z7X). (Fig. 20) The new […]

May 22, 2025 —

Remove Protective Films on Overhead Console During PDI on the ESCALADE IQ/IQL

During the Pre-Delivery Inspection (PDI) of the 2025-2026 ESCALADE IQ/IQL, all interior protective coverings should be removed as covered on the PDI form, including on the front overhead console. (Fig. […]

May 22, 2025 —

Diagnostic Tips for Audio and Display Screen Concerns on IOK Radios

There may be several display screen concerns and other conditions on the infotainment system (RPO IOK) of some 2022-2025 Silverado, Tahoe, Suburban, Sierra, Yukon, HUMMER EV; 2024-2025 Corvette, Silverado HD […]

May 13, 2025 —

Required Information for Restricted IOK Radios

The infotainment system (RPO IOK) on 2022-2025 Silverado, Tahoe, Suburban, Sierra, Yukon, HUMMER EV; 2024-2025 Corvette, Silverado HD and Sierra HD models is on restriction (U.S.). (Fig. 3) If the […]

May 13, 2025 —