The GM Warranty Parts Center (WPC) requests the return of specific parts replaced at dealerships through the Global Warranty Management (GWM) system to better understand and help resolve product issues […]
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 […]
The latest diagnostic assistance from the professionals at the GM Technical Assistance Center is now available in the March GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
The GDS2 core update 22.8.00900 in Techline Connect that was recently released on March 10 included various bug fixes. The update will download and install automatically upon logging into Techline […]
The EL-52100 MDI 2 is required for control module programming, configuration and setup on GM vehicles equipped with the Vehicle Intelligence Platform (VIP) electrical architecture. (Fig. 2) Fig. 2 […]
Low and erratic oil pressure at idle may be found on some 2024-2025 Acadia, Traverse; and 2025 Enclave models equipped with the 2.5L engine (RPO LKO). DTC P06DD (Engine Oil […]
There may be several communication DTCs set along with several Driver Information Center messages —Service Power Steering, Service StabiliTrak, Service Rear Drive, Service Restraint System — displayed on some 2020-2024 […]
There may be a “Heavy Fuel Use” message on the Driver Information Center (DIC) (Fig. 11) at times while driving on some 2023-2025 Escalade, Silverado 1500, Tahoe, Suburban, Sierra 1500, […]
The monthly GM Service Know-How Emerging Issues seminars provide service/technical information on current issues and GM-certified repairs. This month the seminar covers valve body repair on the 10L80 transmission. (Fig. […]
2024-2025 Equinox EV and 2025 OPTIQ models feature large, overlapping windshield wipers that provide a clear view of the road ahead for drivers. If the wiper arms are not aligned […]
When driving through an automatic car wash, a loud pop (oil canning) sound may be heard on some 2023-2025 Colorado and Canyon trucks. The pop sound may be the roof […]
Before installing a variety of GM Accessories, such as keyless entry, upsize wheels and tires, lights/cargo lamps and others, on GM vehicles, it’s important to check for vehicle compatibility, if […]
When creating a Technical Assistance Center (TAC) case using the Dealer Case Management (DCM) system on a 2020-2025 Corvette with a Direct Clutch Transmission (DCT) (Fig. 19) performance or leak […]
The latest diagnostic assistance from the professionals at the GM Technical Assistance Center is now available in the February GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
A vehicle shudder and a growl or humming sound may be present when driving between 28-53 mph (45-85 km/h) on some 2024 Envista and Trax models equipped with the 6T40 […]
Some 2023-2025 Colorado, Silverado 1500, Canyon and Sierra 1500 trucks equipped with the 2.7L engine (RPO L3B, L2R) may have poor heater performance due to blocked coolant flow. The coolant […]
Water Leak on Front Passenger Floor
Power Lines Affecting Electrical System of Upfitted Vehicles
Search TAC Resolutions in CX Connect
GM Service Know-How Emerging Issues
Inoperative Sunroof Due to Air Deflector Clips
Headlamp Cooling Fan Humming Sound
September Service Newsletter from the Experts at GM TAC
Faster Case Response Times in CX Connect
Ground Fault at the Transmission Case
Sunshade Lamp Supply Circuit Draw
Transmission Park Lock Valve Parts Released
Automatic Transmission Fluid Appearance and ColorDCA-8000
Troubleshooting
Guide
TAC Newsletter October 2025
TAC Newsletter September 2025
Techline Connect Tips November 2024
CX Connect Case Creation Help + Tips and Tricks
The latest Original Equipment (OE) Battery Ratings chart for the 2026 model year is now available under the Reference Charts menu for use when testing OE batteries. (Fig. 5) […]
The latest GM Dealer Infrastructure & Security Guidelines (DISG) have been updated with recommended firewall exceptions for Techline Connect applications. (Fig. 1) The following exception has been added and needs […]
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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