Monthly Archives: August 2016

Updated Corvette Driveline Support Assembly Replacement Procedure

Slow engine cranking, a dead battery or a no start condition on 2014-2016 Corvette models equipped with an automatic transmission may be caused by a misaligned driveline support assembly (Fig. 1). The misaligned assembly can cause excessive pressure and damage … Continue reading

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Take the 2016 Service Technician Satisfaction Survey Today

The 2016 Service Technician Satisfaction Survey is taking place now and technicians at all dealerships are encouraged to participate. GM and other automotive manufacturers co-sponsor this annual survey to collect feedback on service trends, satisfaction levels, dealership operational issues and … Continue reading

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AFIT Adapter Cable Identification and Vehicle Application Chart

The Active Fuel Injector Tester (AFIT) Diagnostic Kit, essential tool CH-47976 (Fig. 7), is designed to test fuel injectors on port and direct injected engines going back to the 1996 model year. As new vehicle applications have been introduced, the kit … Continue reading

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Airbag Connector Seating

The airbag warning lamp may be illuminated on some 2016 Malibu (VIN Z); 2016-2017 CT6, Camaro, Volt; and 2017 LaCrosse, ATS, CTS, XT5, Escalade models, Colorado, Impala, Silverado, Tahoe, Suburban, Acadia (VIN N), Canyon, Sierra and Yukon models. One or … Continue reading

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Hydraulic Brake Conditions on Electric/Hybrid Vehicles

There may be several brake system conditions on the 2016-2017 Volt and Malibu Hybrid (RPO HP4) that could be related to the hydraulic components. These types of hydraulic issues should not be overlooked when diagnosing a condition on electric/hybrid brake … Continue reading

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Special Programming Instructions for Service Replacement Radios

A new service replacement radio has been released for 2014-2016 Encore, Verano, Camaro, Caprice, Cruze, Equinox, Malibu, Orlando, SS, Volt, Terrain; and 2016 Cascada models equipped with Radio RPOs UFU, UFU/UP9 or UHQ/UP9. Due to this change, the radio part … Continue reading

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Testing for Accurate Fuel Economy Results

Owners of 2010-2017 Equinox and Terrain models equipped with the 2.4L engine (RPO LAF, LEA) and front-wheel drive may have questions about the actual fuel economy of their vehicle. In most cases, a small amount of city driving will quickly … Continue reading

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Lane Keep Assist Steering Intervention

Some of the latest active safety features available on GM models employ sophisticated camera-, radar- and sensor-based technologies to help assist drivers avoid a collision or reduce its impact.   Lane Keep Assist (RPO UHX) — available on many newer … Continue reading

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All-New 2017 Buick LaCrosse is Here

The all-new longer, lower and wider 2017 Buick LaCrosse debuts the new face of Buick with the return of the three color Buick tri-shield insignia set against darkened waterfall grille bars. (Fig. 3) The 2017 LaCrosse is about 300 pounds (136 kg) … Continue reading

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Lumbar Back Massage Performance

The new 2017 LaCrosse offers driver and front passenger seats with a massage feature (RPO AF6, AKE). Some passengers may feel that the lumbar back massage is inoperative or the performance is poor.   The intensity of the lumbar back … Continue reading

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Check Dealership IT Guidelines before You Buy; Windows 10 Now Supported

If you’re thinking about buying a new computer for use in the dealership service department, check the GM Dealer Infrastructure Guidelines first. A revised version of the guidelines was recently released and is available at www.gmdesolutions.com. Click the Techline IT … Continue reading

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GDS 2 Core and Diagnostic Package Updates

The Global Diagnostic System (GDS) 2 receives periodic core updates throughout the year. The latest version, 15.0.14700, released on August 29, 2016 contains several software bug fixes as well as major application changes that impact the way GDS 2 looks … Continue reading

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Night Vision Working in Daylight or Inoperative

The Night Vision feature (Fig. 13) on some 2016 CT6 models may be on during daylight hours, or it may be inoperative and a Service Night Vision System message may be displayed on the Driver Information Center.   Fig. 13 … Continue reading

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Cleaning Excessive Carbon from Sticking Valves

2000-2015 GM passenger cars and light-duty trucks equipped with gasoline engines that experience engine misfire, rough idle, extended crank or crank/no start conditions may be the result of major carbon build-up on the intake and/or exhaust valves. One or more … Continue reading

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Service Know-How

10216.09V – Emerging Issues September 8, 2016   The latest service topics from Brand Quality and Engineering are reviewed, including information on replacement of the Corvette driveline support assembly and how to adjust the shift cables on a 2016-2017 Cruze … Continue reading

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