GM studies indicate that restricted transmission oil flow is detrimental to the life of any automatic transmission. Plugged oil coolers and oil cooler line restrictions cause insufficient transmission lubrication and […]
The Positive Crankcase Ventilation (PCV) system and other components that affect emissions, but do not turn on the Check Engine lamp if there is a malfunction, are required by the […]
The Check Engine MIL may be illuminated and DTC P20EE (NOx Catalyst Efficiency Below Threshold) may be set on some 2017-2018 Silverado and Sierra models equipped with the 6.6L Duramax […]
The latest update to the GM Global Electronic Parts Catalog (EPC) includes several new features that make it easier and more convenient to search for parts and to quickly find […]
At TechLink, we cover a wide range of GM service topics, from the latest diagnostic and technical repair information to new model features, special tools and more. It’s our mission […]
Did you know the new Dealer Case Management (DCM) system allows U.S. GM dealership service technicians to create, view, and update GM Technical Assistance Center (TAC) cases in real-time? DCM […]
A new version (18.1.161) of the GDS2 core software has been released recently. The update includes numerous software bug fixes. To download the software update, click the GDS 2 […]
GM has recently released a new refrigerant PAG (Polyalkylene Glycol) oil (Fig. 7) specifically engineered to service GM vehicles built with belt-driven air conditioning (A/C) compressors that use the environmentally-friendly […]
The cooling system surge tank for 2017 Silverado and Sierra models equipped with the 6.6L Duramax diesel engine (RPO L5P) features a new design with two tank caps. The fill […]
The all-new 2018 GMC Terrain is available with a variety of new features that may be unfamiliar to some customers, who may bring their vehicle into the dealership for service […]
The GM Technical Assistance Center, or TAC, (U.S.) has established Action Centers for the 2018 Cadillac CT6 equipped with Super Cruise (RPO UKL) (Fig. 19) and the 2018 Buick Enclave. […]
Next Generation Digital Vehicle Platform Provides Foundation for Future Technology
Getting Ready for Techline Connect
New EL-52545 TPMS and RF Tool Makes TPMS Sensor Relearn Easy
Diesel Fuel Additives
Transmission Control Module Connector
Intermittent Shift to Park Message
Whistle Sound from the Engine
GM Service Know-How
Installing Techline Connect
Water Intrusion in Active Grille Air Shutter Connectors
Upper B-Pillar Rattle Sound
Incorrect Infotainment Screen Pop-up Messages
Engine Harness Contact with Underhood Components
Exhaust Leak Conditions
Fuel Injector Driver DTCs Diagnostic Tip
Low Oil Pressure Condition on 2.0L and 2.5L 4-Cylinder Engines
EL-52545 TPMS and RF Tool
PC & Diagnostic Bundle
Diagnostic Charge
Battery Station
Tips for Warranty Reprogramming Events
The Active Fuel Injector Tester (AFIT) Spark Ignited Direct Injection (SIDI) Diagnostic Kit, essential tool CH-47976, was released several years ago for port and direct injected engine applications (Fig. 7) […]
GM has recently updated the Service Programming System (SPS) with a new method of selecting a J2534 tool in TIS2Web. A J2534 tool (MDI, MDI 2, or other J2534 device) […]
2019 GM models feature a variety of technology and new systems that may be unfamiliar to technicians and service consultants in GM dealerships. Following are several videos highlighting new features […]
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