The 2025-2026 ESCALADE IQ/IQL and VISTIQ feature a first-of-its-kind rear cabin heating/cooling system (RPO C69) for 3rd-row passengers. The separate HVAC system, controlled by using the Front Command Center touchscreen […]
The GM DCA-8000P Diagnostic Charger – an Essential Tool for all U.S. dealerships – is the latest generation battery charger and tester from Midtronics that provides fast, accurate testing results. […]
A new half shaft part number has been released for 2019-2025 Silverado 1500 and Sierra 1500 trucks equipped with the Z71 Off-Road Suspension Package (RPO Z7X). (Fig. 20) The new […]
During the Pre-Delivery Inspection (PDI) of the 2025-2026 ESCALADE IQ/IQL, all interior protective coverings should be removed as covered on the PDI form, including on the front overhead console. (Fig. […]
There may be several display screen concerns and other conditions on the infotainment system (RPO IOK) of some 2022-2025 Silverado, Tahoe, Suburban, Sierra, Yukon, HUMMER EV; 2024-2025 Corvette, Silverado HD […]
The infotainment system (RPO IOK) on 2022-2025 Silverado, Tahoe, Suburban, Sierra, Yukon, HUMMER EV; 2024-2025 Corvette, Silverado HD and Sierra HD models is on restriction (U.S.). (Fig. 3) If the […]
2025 Escalade, Escalade ESV and Escalade V-Series models built early in the model year offered a power-assist exterior door system (RPO APD with R6W) that has power-assisted door opening and […]
When replacing a valve body or transmission on a GM vehicle, it is essential to gather Mechanical Characterization & Virtual Matching (MCVM) data from the cloud. Due to manufacturing variations, […]
The monthly GM Service Know-How Emerging Issues seminars provide service/technical information on current issues and GM-certified repairs. This month the seminar previews the 2025 Corvette ZR1. (Fig. 12) Fig. […]
A new GM Technical Assistance Center (TAC) process has been implemented to ensure the customer is being considered when TAC is working in partnership with dealership technicians to repair customers’ […]
All current GM vehicles are manufactured with fluorescent dye installed in the air conditioning refrigerant system. The dye mixes and flows with the A/C compressor oil to help in locating […]
There may be several inoperative electrical features on some 2019-2025 Blazers. (Fig. 4) These conditions may include inoperative door chimes and door lamps, inoperative power mirrors or a distorted driver-side […]
The front compartment hood on some 2024-2025 Corvette models may not fully unlatch when one of the hood release buttons is pressed if the 12V battery is weak, resulting in […]
The approach lighting on the 2024-2025 Traverse and Acadia has several differences compared to the lighting elements on the 2025 Enclave. It’s important to understand these differences when diagnosing any […]
The latest diagnostic assistance from the professionals at the GM Technical Assistance Center is now available in the April GM Technical Assistance Center (TAC) Newsletter. It covers a number of […]
There are several GM Accessories available that update the design and functionality of the outside rearview mirrors on 2022-2025 HUMMER EV models. (Fig. 1) GM Accessories range from different housing […]
The available Executive Second-Row Seats (RPO ABV, AL4) in the 2025 ESCALADE IQ (Fig. 5) feature power operation for second-row passengers, which makes it easy to adjust the seats for […]
The Super Cruise driver assistance technology may disengage or be unavailable on some 2021-2025 Escalade; 2023-2025 LYRIQ; 2024-2025 Traverse, Acadia; 2025 Enclave, CT5, ESCALADE IQ, OPTIQ, Blazer EV, Equinox EV, […]
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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