The front Park Assist system may issue false alerts on the Driver Information Center on some 2023-2026 Silverado 1500, Sierra 1500; 2024-2026 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks when there […]
Some 2023-2024 Equinox and Terrain models equipped with the 1.5L engine (RPO LSD) (Fig. 13) may have an illuminated Check Engine MIL and DTCs P0521 (Engine Oil Pressure Sensor Performance), […]
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 […]
Google Gemini brings AI assistance to 2022-2027 Chevrolet, Buick, GMC and Cadillac models equipped with Google built-in (RPO IVE, IVD, IOK) — approximately four million vehicles in the U.S. are […]
New Diagnostic Steps Added for 4WD Front Axle Disconnect DTCs C118D, C10BA, C116F and C119C GM Engineering has identified a previously missing connector interface that requires inspection and circuit verification […]
It may not be possible to learn the Trailer Tire Pressure Monitor (TPM) sensors to some 2024-2026 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks or the TPMS pressure readings may not […]
The latest TechLink reference chart is now available covering transmission fluid capacities for the 2026 model year. The 2026 Transmission Fluid Capacities chart can be viewed under the Reference Charts […]
The monthly GM Service Know-How Emerging Issues seminars provide service/technical information on current issues and GM-certified repairs. The June seminar (10226.06V – U.S.) takes an in-depth look at the Midtronics […]
A Preview of the New Parts Catalog Coming Soon. GM dealership service and parts operations will soon see a significant shift in how parts are identified, cataloged, and integrated into […]
The latest Techline Connect update, released on June 15, 2026, includes an enhancement to the dashboard view showing a new Proactive Alert for potential parasitic drains. (Fig. 16) Fig. […]
The Midtronics DCA-8000 Diagnostic Charger (Fig. 1) is the latest generation battery charger and tester from Midtronics. It provides fast, accurate testing results and is the GM-required tool for charging […]
Some 2020-2026 Silverado 1500 and Sierra 1500 trucks equipped with the 3.0L diesel engine (RPO LM2, LZ0) may have a squeak or clunk sound coming from the rear of the […]
The new 2027 Bolt features a 65-kWh lithium iron phosphate (LFP) high-voltage battery pack, enabling faster charging. It uses a native North American Charging Standard (NACS) charging port that provides […]
A no start condition on some 2025-2026 Acadia, Traverse and Enclave models may be caused by a rear wiper motor binding or a bent wiper arm. (Fig. 16) Fuse F17UA […]
New Belt Drive Rack and Pinion Steering Power Pack Replacement
Unable to Learn Tire Pressure Monitor Sensors
1.3L Engine Coolant Control Valve Failure
Fuel Injection Pump Installation and Diesel Engine Timing
High Resistance on Grounds G103A, G103B
My Open Cases List View Issue in CX Connect
Making Associated Accessory Warranty Claims
TAC and TCSC Phone Support to Require CX Connect Case Number
Vehicle-Wide Programming Update for EVs
Fuel Pump Power Control Module Internal Short
GM Service Know-How Emerging Issues
Guided Diagnostics – The Next Step in a More Focused Repair Path
Service Door Latch Message and Child Safety Lock Condition
Aftermarket Lighting, Sensor Obstruction May Cause False Front Park Assist Alerts
Oil Pan Wiring Harness Diagnostic TipsTAC Newsletter August 2026
TAC Newsletter April 2026
DCA-8000
Troubleshooting
Guide
MDI-2 Connections and Advanced Setup 2026
CX Connect Case Creation Help + Tips and Tricks
GM has recently established a new air conditioning refrigerant leak diagnostic procedure for GM EVs and PHEVs — including the Silverado EV, Blazer EV, Equinox EV, Bolt EV/EUV, Corvette E-Ray, […]
The latest update to GDS 2 in Techline Connect provides technicians with the ability to build personalized data parameter lists tailored for specific diagnostic sessions — identifying only the data […]
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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