New 2024 Equinox EV Touts Style and Performance
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. […]
MDI 2 Manager Software Update
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 […]
Purging the Hybrid/Electric Battery Coolant Pump
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 […]
Steering Bump Condition on Rough Roads
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. […]
Looking for More Information? Here’s Where to Find the Latest Technical Resources Available
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 […]
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 covers Vehicle-Wide Programming. (Fig. 26) Fig. 26 […]
Wiper Blade Performance Diagnosis
Streaking is the most common warranty condition found with wiper blades on GM models. However, worn blades are not the only cause of streaking. Several other issues that can affect […]
8-Speed Transmission Noise Concerns
There may be a noise concern on some 2015-2019 Corvette; 2015-2020 Escalade, Yukon; 2015-2024 Silverado 1500, Sierra 1500; 2016-2018 CT6; 2016-2019 ATS, CTS; 2016-2023 Camaro; 2017-2023 Colorado, Canyon; 2017-2024 Express, […]
Inoperative IntelliBeam Auto High-Beam Headlamps
The functionality of the IntelliBeam automatic high-beam headlamps may be inoperative on some 2024-2025 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks. (Fig. 17) The side blind zone and side object detection […]
Wheel Drive Shaft Retention Snap Ring Design Change
There has been a design change to the wheel drive shaft retention snap ring on 2024-2025 Silverado EV, Sierra EV, HUMMER EV Pickup, HUMMER EV SUV; and 2025 BrightDrop 600. […]
August 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 August GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
New Vehicle-Wide Programming for Software Updates
With its enhanced capacity and ability to manage technology complexity, the GM Vehicle Intelligence Platform (VIP) electrical architecture offers the capability of managing over 100 electronic control modules. When necessary, […]
Front Bumper Bracket May Affect Active Grille Shutter Operation
Some 2024 Acadia, Traverse; and 2025 Enclave models may have an active grille shutter malfunction along with DTC P059F (Active Grille Air Shutter 1 Performance) set in the Engine Control […]
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 highlights adjustments to the HUMMER EV Sky Panel. (Fig. […]
Unwanted Reverse Automatic Braking
Backing out of the garage may bring some vehicles equipped with Reverse Automatic Braking to a quick stop. The design sensitivity of the rear virtual bumper on 2023-2024 LYRIQ; 2024 […]
Adjusting the Hood Bumpers and Latch to Remove Low Spots on Hood
Some 2024 Traverse models may show low spots or dimples on the front and center portions of the hood. The low spots will only be noticeable when the hood is […]
Print Edition
Previous Articles
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 Color
DCA-8000
Troubleshooting
Guide
TAC Newsletter October 2025
TAC Newsletter September 2025
Techline Connect Tips November 2024
CX Connect Case Creation Help + Tips and Tricks
