Monthly Archives: March 2017

New 9T50 9-Speed Automatic Transmission

GM’s all-new Hydra-Matic 9T50 9-speed automatic transmission (RPOs M3E, M3D, M3H) — currently available on the 2017 Malibu, 2017 Cruze Diesel, 2018 Equinox and upcoming 2018 Terrain — is designed to deliver excellent efficiency, performance and refinement. (Fig. 1) By … Continue reading

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New Service Information Subsections for 2018 Model Year

For the 2018 model year, there are a number of new subsections that have been added to the Service Information. In addition, several subsections have been moved to different service categories. As a result, if you’re searching for the service … Continue reading

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Sensor Locations of Hands-Free Power Liftgates

A growing number of GM models now offer an available hands-free power liftgate or trunk, which uses a sensor under the rear bumper (Fig. 6) of the vehicle that, when activated, opens or closes the liftgate or trunk. Depending on … Continue reading

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Fuel Line Pulsation Sound

A rattle or ticking sound may be heard coming from the back of the left valve cover on some 2014-2017 Corvette, Silverado, Sierra; 2015-2017 Tahoe, Suburban, Yukon, Escalade; 2016-2017 CTS-V, and Camaro models equipped with the following engines: 6.2L (RPO … Continue reading

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Missing Connector Seals

Some 2015-2017 Silverado, Tahoe, Suburban, Colorado, Sierra, Yukon, Canyon, and Escalade models equipped with 4WD (RPOs NQF, NQH, NQ6, NPO, NG7) may have an intermittent Service 4 Wheel Drive message displayed on the Driver Information Center (DIC). There may be … Continue reading

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Supercharger Idler Pulley Sounds

A scraping or moaning sound may be heard from the supercharger idler pulley on some 2017 CTS-V, Corvette; and 2017-2018 Camaro models equipped with the supercharged 6.2L V8 engine (RPO LT4). The sound will be most noticeable when the engine … Continue reading

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Techline Data Service Update

TDS available in TIS2Web for all dealerships TIS2Web and the Service Programming System (SPS) put vehicle software calibration files within easy reach during programming. They just need to be downloaded from the internet. But what if the files were already … Continue reading

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GDS2 Offline Mode in Latest Software Update

GDS2 software updated version 17 was recently released. This update features a major application change that allows GDS2 to operate in Offline mode when an internet connection is not available.   If the PC does not have any network connection, … Continue reading

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2017 Service Manager Satisfaction Survey Ends May 5

The 2017 Service Manager Satisfaction Survey is now available to service managers of all GM dealerships. The deadline for completing the survey is May 5.   GM and other automotive manufacturers co‐sponsor the industry study of service managers across the … Continue reading

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Front View Camera Calibration

When replacing a front view camera module (Fig. 5) on 2012-2018 GM models equipped with a front view camera, it’s necessary to reprogram the module as well as perform the calibration process for the front view camera system. The calibration … Continue reading

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Duramax Diesel Engine Coolant Leak

2017 Silverado and Sierra models equipped with the 6.6L Duramax diesel engine (RPO L5P) may display a Driver Information Center low coolant message or may show coolant consumption or a coolant leak. These conditions may be due to cooling system … Continue reading

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Ticking Sounds on Active Fuel Management Cylinders

A ticking or knocking sound may be heard on some 2016-2017 ATS, CT6, CTS, Camaro; 2017 LaCrosse, XT5, Colorado, Canyon and Acadia models equipped with the 3.6L engine (RPO LGX). The 3.6L engine uses Active Fuel Management (AFM) to conserve … Continue reading

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