GM EV customers with a GM-approved North American Charging Standard (NACS) DC adapter now have access to more than 17,800 Tesla Superchargers throughout the U.S. and Canada to quickly charge […]
The power hood, (eTrunk™), available on the 2022-2025 HUMMER EV Pickup; 2024-2025 HUMMER EV SUV; 2024-2025 Silverado RST EV; and 2024-2025 Sierra Denali EV offers secure storage in the front […]
Some 2025 Corvettes may have an excessive squeal or squeak sound from the front brakes. (Fig. 16, optional equipment shown) The sound normally only occurs on initial brake applications after […]
The latest Original Equipment (OE) Battery Ratings chart for the 2025 model year is now available under the Reference Charts menu for use when testing OE batteries. (Fig. 1) […]
Recently, the Techline Connect Support Center (TCSC) has received a substantial increase in call volume. As the increase in calls drives up the wait time to talk to an agent, […]
An engine coolant leak may be noticed on the ground or on the front of the engine after the vehicle has been parked for a while on some 2023-2024 Corvette […]
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 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 sunroof sunshade repair. (Fig. 16) Fig. […]
The Techline Customer Support Center (TCSC) has introduced Dealer Case Management (DCM) support for all inbound cases. The DCM system (U.S.) enables dealership technicians to create, view and update Techline […]
GM and Bosch Diagnostics continue to find counterfeit MDI and MDI 2 tools (Fig. 5) available to the aftermarket through several online websites. These tools appear very authentic from their […]
Certified Class “0” insulating gloves rated at 1000V with leather protectors (Fig. 6) provide an insulative barrier between an electrical point and the skin of an individual, and are required […]
The updated TechLink Engine Oil Capacities chart for the 2024 model year is now available under the Reference Charts menu. The chart includes engine, RPO, specifications (liters and quarts), oil […]
The latest diagnostic assistance from the professionals at the GM Technical Assistance Center is now available in the September GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
The all-new 2024 Equinox EV (Fig. 1) focuses on safety, space, performance and style — all while offering the value attributes that the Equinox nameplate is known for. Fig. […]
A new software update for the MDI 2 Manager is being rolled out to GM dealerships (U.S.) The staggered rollout of the new MDI 2 Manager software (version 9.1.2202.128) includes […]
The 2024-2025 Corvette E-Ray features an independent cooling system to cool the high-voltage battery. If air gathers and gets trapped in the hoses around the Hybrid/Electric Vehicle Battery Coolant Pump […]
A slight knocking or thud sound may be heard coming from the steering column area when driving some 2014-2025 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks over rough roads or potholes. […]
Automotive technology changes quickly, which, for dealership technicians, requires dedication as well as training to stay up to date on the latest changes in today’s advanced vehicles. A key to […]
CX Connect Case Creation Tips
New Diagnostic Strategy: Reprogram Control Modules Before Replacement
Corvette Center Console Latch Pushbutton Replacement
New Dash Cover Addresses Windshield Glare
The Info on Dealer Information — Choosing the Right Contact for Service Department Concerns
GM Service Know-How Emerging Issues
Learn More About CX Connect – New System Going Live Soon
Techline Connect & GDS2 Split Update Released
Poor A/C Performance Due to Loss of Refrigerant
Loss of A/C and Warm Air Conditions
July Service Newsletter from the Experts at GM TAC
Power Hood Closure Conditions
Diesel Engine Oil Cooler Seal Leak
Check Grounds for No Start Condition
Battery Cable Clamp Alignment Results in Low Voltage
Upper Body Auxiliary Lamp Connection
Anti-Chip Coating Appearance on Full-Size Trucks
GM Service Know-How Emerging Issues
OneCRM and Dealer Case Management System MigrationDCA-8000
Troubleshooting
Guide
TAC Newsletter September 2025
TAC Newsletter August 2025
Techline Connect Tips November 2024
CX Connect Case Creation Help + Tips and Tricks
The fluorescent dye installed in the air conditioning refrigerant system of all current GM vehicles helps in locating leaks in the A/C system. Using the GE-42220 Universal 12V Leak Detection […]
As Service Programming System (SPS) events become larger in size and more frequent for all GM models, it’s important to ensure the most reliable connection method to the MDI 2. […]
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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