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. […]
Some 2025-2026 ESCALADE IQ models may have a 3rd-row seat that cannot be operated using the 3rd-row seat switches in the cargo area. (Fig. 10) Fig. 10 If […]
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) […]
Blank Screen Display Diagnostic Tips
Make a Reservation to Meet with Your FSEs in 2026
GM Introduces Digital Key, Offering Convenience and Easy Access
Key Cards Put Vehicle Access in Your Wallet
New 2026 Corvette ZR1X Delivers Twin-Turbo AWD Hypercar Performance
MDI 2 Manager Update Adds Support for New Wireless Dongles
Latest CX Connect Update Delivers Streamlined Operation and Enhanced Search Functions
GM Service Know-How Emerging Issues
Engine Control Module Diagnosis and ECM Part Restriction
Front Brake Caliper Sound and Uneven Pad Wear
3rd-Row Seat Switch Diagnosis
Check Ground Terminals for Transmission Fluid Temperature Sensor Circuit Condition
December Service Newsletter from the Experts at GM TAC
FSE Technician Recognition Awards – 4th Quarter 2025
Enroll Today in the 2026 Technician Excellence Program
Verify Vehicle Settings After Rocker Panel Ground Lamps Installation
Heated Steering Wheel Replacement
Door Panel Wood Trim Condition
GM Service Know-How Emerging IssuesDCA-8000
Troubleshooting
Guide
TAC Newsletter January 2026
TAC Newsletter December 2025
Techline Connect Tips November 2024
CX Connect Case Creation Help + Tips and Tricks
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; […]
To avoid wait times for technical support in the dealership, prior to contacting the GM Technical Assistance Center (TAC) and Techline Customer Support Center (TCSC) as well as and other […]
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.
Designed by WPZOOM
