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 […]
After a wheel alignment, the Super Cruise system (RPO UKL) – Lane Active Safety-Keep Assist, Hands-Free Lane Following (Entire Speed Range) (Fig. 9) – may not center the vehicle properly […]
A Service All Wheel Drive message may be displayed on the Driver Information Center in some 2020-2023 Encore GX and 2021-2023 Trailblazer models equipped with the 1.3L engine (RPO L3T) […]
Some 2020-2024 Silverado 1500, Silverado 2500HD/3500HD, Sierra 1500, Sierra 2500HD/3500HD; 2021-2024 Tahoe, Suburban, Yukon and Escalade models equipped with the 3.0L diesel engine (RPO LZ0, LM2) or 6.6L diesel engine […]
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 […]
A growling, knocking or rhythmic thumping sound may be heard on some 4.3L engines (RPO LV3), 5.3L engines (RPO L82, L84) and 6.2L engines (RPO L87, LT1, LT2, LT4, L8T) […]
Some 2020-2024 Corvette convertible models may have a water leak around the side glass. The leak, which is found at approximately the middle rear of the side glass area (Fig. […]
The GM Accessory Power Tonneau Cover (part number 86575628 or 86595165) is available on 2022-2024 HUMMER EV Pickups. (Fig. 15) If the hard power-retractable tonneau cover is not operating properly, […]
The monthly GM Service Know-How Emerging Issues seminars provide service/technical information on current issues and GM-certified repairs. This month the seminar takes a look at the “E-Phaser” cam phaser system […]
With the MDI Manager application software, the MDI 2 can be configured to communicate with a PC using several possible networks, such as a USB cable, ethernet cable, Wireless Local […]
Some 2017-2025 Camaro models equipped with the 6.2L V8 engine (RPO LT4) may have a buzzing, ticking or rattle sound coming from the passenger side of the vehicle. The sound […]
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 […]
An exhaust rattle may be heard underneath the vehicle on some 2018-2024 Camaro models with the 3.6L engine (RPO LGX). The rattle may be most noticeable when starting the engine […]
The 2023 XT5 and XT6 are available with two heated steering wheel options. These include the manual heated steering wheel (RPO UVD) and the automatic heated steering wheel (RPO KI3). […]
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 Hands-Free Start operation on EVs. (Fig. 21) […]
The estimated 2024 GM Essential Tool forecast is now available for all U.S. dealerships. The forecast includes all expected Essential Special Service Tools along with shipment timing for the 2024 […]
Some 2024 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks may have an electrical condition where the headlamps flash and/or the windshield wipers pause while wiping. DTC P0606 (Control Module Processor Performance) […]
Diagnosing a whine sound or other internal noise concern in 2019-2024 Malibu; 2020-2024 Encore GX; and 2021-2024 Trailblazer models equipped with the VT40 Continuously Variable Transmission (CVT) (RPO MRG) may […]
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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