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. […]
Techline Connect Tips – Getting the Most Out of the All-in-One Application
HVAC Afterblow Feature Enabled at the Factory
Misfire and Engine Noise Condition
Excessive Load on Trailer Running Lamps
DTC P2101 Set in History
Tapping Sound from Engine
Diagnosing Inoperative Gauges, Communication Concerns Setting DTCs
DTCs Set in the TCM
New GM Global Electronic Parts Catalog Release Offers Multiple Enhancements, Search Functions
New Rear Seat Media System Offers a Choice of HD Entertainment, Headphone Options
3rd-Row Headrest Service Kit
Loose Turbocharger Actuator Bolts
Potential Oil Leak from Camshaft Carrier Gasket
Particulate Matter Sensor Protection Tube Performance Diagnostic Setting False DTC
Green, Pixelated Night Vision Screen
GM Service Know-How Emerging IssuesCorvette Track Prep Requirements
Laptop & MDI 2 Bundle Promotion
TechPRO Professional
Aftermarket Diagnostics
Tips for Warranty Reprogramming Events
Techline Connect Setup
for Updates
Damage to electrical terminals can lead to inaccurate test results, difficult diagnosis and system failures. When servicing a suspected wire/terminal issue, be sure to check for the following conditions: Any […]
Techline Connect, GM’s next generation diagnostic application, has released a new tool to help determine the condition of a vehicle’s battery. Battery Condition is determined using “Power of Green;” a […]
The infotainment system of the new Trailblazer includes a standard 7-inch diagonal touchscreen with a variety of settings and new technology. Users can set up the system to use wireless Apple CarPlay and Android Auto as well as Alexa Built-In.
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