Monthly Archives: September 2017

Using the TransFlow Transmission Oil Cooler Flush and Flow Test Tool

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 elevated operating temperatures that can lead to premature transmission failure. … Continue reading

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Tamper-Proof Drive Bit Set for Emissions Components

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 Air Resource Board (ARB) to have tamper-proof fasteners to prevent … Continue reading

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Diagnosing the Selective Catalyst Reduction System

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 diesel engine (RPO L5P). There may be several reasons why … Continue reading

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New Global Electronic Parts Catalog Release Delivers Better Results

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 the right parts information. GM dealerships can access the EPC … Continue reading

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Take the 2017 TechLink Reader Survey

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 to provide the latest GM technical news and repair information … Continue reading

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Get Real-Time Feedback with the TAC Dealer Case Management System

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 increases the speed and efficiency of case management to help … Continue reading

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New GDS2 Core Software Update

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 icon on the TIS2Web home page. (Fig. 6)   Fig. … Continue reading

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New Universal Refrigerant PAG Oil for R-1234yf A/C Systems

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 alternative refrigerant R-1234yf.   Fig. 7   Previously, there were … Continue reading

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Left-Hand Thread Cooling System Pressure Test Adapter

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 cap on top of the tank uses a left-hand thread … Continue reading

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Common Questions on the New 2018 Terrain

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 when a system is operating as designed. Be prepared to … Continue reading

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New TAC Action Centers for CT6 Super Cruise and Enclave

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. (Fig. 20)   Fig. 19   TAC Action Centers are … Continue reading

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