Monthly Archives: July 2015

Advanced Diagnostics – Proactive Alert Expands for 2016, Adds New Models

The new Advanced Diagnostics – Proactive Alert service monitors the engine cranking and fuel delivery systems for certain performance issues and notifies owners through OnStar® to help avoid potential vehicle conditions. It replaces the previous Vehicle Health Management (VHM) service. … Continue reading

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The Next Generation of GlobalConnect

When you log in to GlobalConnect for access to the Service Information, TIS2Web and many other Techline applications, you’re now presented with the next generation of GlobalConnect that not only looks different, but also has a number of new features. … Continue reading

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Battery Saver Message or Low Battery Indicator Displayed

A Battery Saver message (Fig. 8) or red battery indicator (Fig. 9) may be displayed in the Driver Information Center on some 2014-2015 Spark EV, ELR; and 2011-2015 Volt models. There may or may not be any low voltage DTCs … Continue reading

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Lack of Power in High Ambient Temperatures

Some 2010-2013 Avalanche, Silverado, Sierra; and 2010-2014 Suburban, Tahoe and Yukon models equipped with the 5.3L cast iron block engine (RPO LMG) may experience a lack of power on initial acceleration from a stop when the ambient temperature is approximately … Continue reading

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New Calibrations for the ECM and TCM

If a 2015 Colorado or Canyon equipped with the 3.6L V6 engine (RPO LFX) exhibits any of the following engine or transmission conditions, complete the following procedure before replacing any parts or performing other repairs.   Engine/Transmission Conditions: • Flashing … Continue reading

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Engine Harness Routing Conditions

One or more of the following conditions may be present on a 2013-2015 Equinox or Terrain equipped with the 3.6L V6 engine (RPO LFX): • Intermittent starter-type chatter noise • Longer than usual engine crank cycle • Intermittent illuminated Service … Continue reading

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Wet Front Floor Carpet

Some 2015 Silverado 1500 and Sierra 1500 pickups built after March 1, 2015, may have a water leak that leaves the left or right front floor carpet wet.   Pull back the carpet on affected side (left or right) at … Continue reading

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Power Steering Conditions and Service Power Steering Message

Some 2015 Colorado and Canyon models may have a loss of power steering assist, a hard to steer condition or display a Service Power Steering message on the Driver Information Center. These conditions may be intermittent.   Fig 17   … Continue reading

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Tire/Wheel Balancing Machines

During tire and wheel diagnosis for a vibration condition, it’s necessary for dealerships to have GM-approved tire force variation measurement equipment (Fig. 1) that can address imbalance, out of round and tire force variation conditions. The right equipment is a … Continue reading

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New Service Information Search Functions

Several enhancements were recently made to GM Service Information based on user feedback, making it easier to search for specific information and providing quick access to commonly used information.   Bulletin Search   When performing a bulletin, campaign and preliminary … Continue reading

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Printing Service Information Graphics

GM Service Information features many graphics that may be more helpful during repairs when printed. TIFF and CGM graphic viewers must be downloaded by the user in order to view the enhanced graphics (Fig. 7) and have access to new … Continue reading

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Do Not Install Windows 10 Upgrade

Microsoft recently announced that Windows 10 will be available on July 29, 2015. In addition, Microsoft is offering free upgrades for one year for Windows 7 and 8 users.   Microsoft pushed an icon to the desktop tray of users … Continue reading

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C-Pillar Area Water Leak

Some 2015 Tahoe, Suburban, Yukon models and Escalade models may have wet carpet in the C-pillar area. The second row outboard seat belt also may be wet or have gotten wet.   To correct the water leak condition, there are … Continue reading

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HVAC Blows Only from Vents

The HVAC system on some 2015 Colorado and Canyon models may not switch to the floor mode. When the floor mode is selected, the HVAC system will typically direct airflow to a blend of the defrost and dash vents.   … Continue reading

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Trunk Does Not Open

The trunk may not open when using the Remote Keyless Entry transmitter (key fob), trunk touchpad or inside release button on the driver’s door panel on some 2014-2015 CTS Sedan and 2015 ATS Coupe models. When trying to open the … Continue reading

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Unable to Change HVAC Mode

On some 2012-2015 Express and Savana vans, it may be difficult to change the HVAC mode or select the Defrost or Recirculation position.   These vehicles use vacuum actuators to operate the HVAC mode, defrost and recirculation doors. Check for … Continue reading

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Service Know-How

10215.07D – Emerging Issues July 9, 2015   To view Emerging Issues seminars: • Log in to www.centerlearning.com –   Select Resources > Service Know-How/TECHAssist > Emerging Issues > Searchable Streaming Video; or –   Select Catalog to search for the course … Continue reading

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Bulletin Review – June 2014

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