Monthly Archives: September 2016

Wireless Charging Device Compatibility and Testing

Wireless charging of mobile devices has become a popular option on a number of 2015 and newer GM passenger cars and light-duty trucks. It’s a convenient way for drivers to charge a smartphone without the need for a charging cord. … Continue reading

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Moving a Vehicle with Electronic Precision Shift and a Dead Battery

The Aisin AF50-8 8-speed automatic transmission (RPO MRC) in the new 2017 XT5 and LaCrosse features the first application of Electronic Precision Shift, which is a shift-by-wire system that enables the transmission range to be selected by electronic control rather … Continue reading

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Updated Battery Testing Guidelines

When testing or charging a battery in a vehicle that is in for service or is part of the dealership’s inventory, the EL-50313 Midtronics GR8 Battery Tester/Charger (Fig. 7) should be used in order to provide an accurate diagnosis about … Continue reading

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New Camaro Convertible One-bow Garnish Serviceability Changes

A change has been made in production recently to the 2017 Camaro Convertible one-bow garnish molding. (Fig. 9) This change was phased into Camaro Convertible production in October.   Fig. 9   The original one-bow garnish design (Fig. 10) featured … Continue reading

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Sunroof Comfort Stop Position Eliminates Wind Buffeting

The 2017 CT6, XT5 and LaCrosse offer a double-sized power glass sunroof (Fig. 13) with a glass panel over the front row that opens and slides.   Fig. 13   To help eliminate wind buffeting with the sunroof open at … Continue reading

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New 2017 Corvette Aero Packages

2017 Corvettes equipped with a Performance Package (RPO CFV, CFZ, Z07) have several different aerodynamic components, or ground effects. These packages may include splitters, end caps, rockers, and spoilers that are to be installed on the Corvette during the Pre-Delivery … Continue reading

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Properly Remove/Replace Door Handle Key Cylinder Cover to Avoid Damage

Many GM models now feature a driver’s door handle with a cover over the door key cylinder. The cover may become loose, damaged or broken if it is not removed or installed correctly. A loose cover may be hard to … Continue reading

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Vehicle Time Out for Parasitic Draw Testing

Many control modules in a vehicle stay awake for different amounts of time after the ignition is turned off. To help with diagnosis of parasitic drains, a Vehicle Time Out chart has been developed for 2015 ATS, ATS-V; 2017 LaCrosse, … Continue reading

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Power Brake Booster Replacement

Some 2016 Malibu Limited (VIN 1) models equipped with a 2.5L 4-cylinder engine (RPO LCV) may have an illuminated Check Engine lamp and DTC P050F (Brake Booster Weak Vacuum) may be set.   The vacuum in the brake booster assembly … Continue reading

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Loose Spark Plug Wires

Some 2014-2015 Silverado 1500, Suburban, Tahoe, Sierra 1500, Yukon, Corvette; 2015-2017 Escalade; 2016-2017 Camaro and CTS-V models equipped with a 4.3L, 5.3L or 6.2L engine (RPO L83, L86, LT1, LV3) may have an illuminated Check Engine lamp and DTCs P0300 … Continue reading

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Active or History DTCs Set in the TCM

There may be several active or history DTCs set in the Transmission Control Module (TCM) on some 2017 ATS, CT6, CTS, Escalade, Camaro, Corvette, Silverado, Suburban, Tahoe, Sierra and Yukon models equipped with the 8L45 transmission (RPO M5T, M5N)) or … Continue reading

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Engineering Information Bulletins and Part Restrictions

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Service Know-How

10216.10V – Emerging Issues October 13, 2016   The latest service topics from Brand Quality and Engineering are reviewed, including operation of the hands-free liftgate (Fig. 30) available on several GM models and an overview of the new Electronic Transmission … Continue reading

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