Monthly Archives: March 2015

The Stop/Start System and AutoStop Operation

If a vehicle does not engage in AutoStop mode or automatically restarts during an AutoStop event, some drivers may feel that the vehicle is not operating properly. Since AutoStop mode is based on many operating factors, it’s important to first … Continue reading

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Emailing and Importing GDS 2 Sessions

Technicians can email a stored data session from GDS 2 to GM representatives, such as Technical Assistance Center consultants or Techline Customer Service Center consultants, to help with diagnosis of a component or system. They also can receive a session … Continue reading

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Survey Results Drive TAC Enhancements

The GM Technical Assistance Center (TAC) in the U.S. is implementing a variety of improvements that will deliver an exceptional customer experience with every call. These changes are based on responses from the latest Dealer Service Survey.   The goal … Continue reading

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Install Screen with New Condenser

When replacing the HVAC condenser on 2011-2012 Cruze models built prior to October 1, 2011 (excluding RPOs WA7 and BVG), a supplemental condenser screen should be installed to protect the condenser from stones or other foreign material/road debris. (Fig. 9) … Continue reading

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Remote Start Heated Seat Settings

On some 2015 Regal models, the heated seats may turn on during a remote start event even though the heated seat option has not been selected in the Vehicle Personalization Settings.   The current personalization menu option (Fig. 12) may … Continue reading

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Normal Rear Window Defogger Clearance

On 2014-2015 Impalas, the rear window defogger does not clear the upper region of the rear window. This is normal operation for the rear window defogger. Do not make any repairs.   The upper gridlines on the rear window are … Continue reading

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Front Seatback Cover Installation

The driver’s or front passenger’s seatback may lean or be turned outward (Fig. 15) on some 2014 Silverado 1500, Sierra 1500; 2015 Silverado, Suburban, Tahoe; 2015 Sierra, Yukon models; and 2015 Escalade models.   Fig 15   This condition may … Continue reading

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Service Theft System Message

The Service Theft System message may be displayed on the Driver Information Center on some 2015 Colorado and Canyon models. DTC B2955 (Security Sensor Data Circuit) also may be set in the BCM.   Do not replace any parts for … Continue reading

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Vibration Analysis, Part 1: Tires

There have been several vibration conditions on 2014 Silverado 1500 and Sierra 1500 and 2015 Silverado, Tahoe, Suburban, Sierra, and Yukon models that have proved to be difficult to diagnose. These vibrations often occur at speeds of 35–45 mph (56–72 … Continue reading

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Vibration Analysis, Part 2: Driveline

The sources of the vibration conditions that may be found on some 2014 Silverado 1500 and Sierra 1500 and 2015 Silverado, Tahoe, Suburban, Sierra, and Yukon models are most often the tires or driveline components, including axles and propeller shafts. … Continue reading

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Hard to Close Rear Door

The rear door may be hard to close on some 2015 Colorado and Canyon extended cab models. The Rear Door Ajar message may be displayed on the Driver Information Center (DIC) and there may be a rattle noise from the … Continue reading

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Intermittent Service Charging System Message/Battery MIL Illuminated

An intermittent Service Charging System message may be displayed on the Driver Information Center (DIC) and/or the battery Malfunction Indicator Lamp (MIL) may be illuminated on some 2014 Malibu models and 2015 Impala (VIN 1) and Malibu models.   2015 … Continue reading

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Appearance of Stowed Folding Top Side Rails

When lowering the folding top on 2011-2015 Camaro convertible models, the side rails, commonly referred to as the “deer legs,” may remain a bit higher than the stowage compartment. (Fig. 13) It may be necessary to push gently on the … Continue reading

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False DTC Set in HMI Module

On some 2014 LaCrosse models built on or before August 26th, 2013; and 2015 LaCrosse, Colorado (RPO IO4) and Canyon (RPO IO4) models, a false DTC B124B sym04 (USB 1 Circuit – Open) may be set in the Human Machine Interface … Continue reading

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Incorrect Song Information Displayed

When listening to a connected iPod® in some 2015 LaCrosse, Regal, ATS, CTS, SRX, XTS, Corvette, Impala, Silverado 1500, Sierra 1500; and 2015 1/2 model year Escalade models, Silverado HD, Suburban, Tahoe, Sierra HD, and Yukon Models (only Utilities and … Continue reading

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Steering Wheel Rattle Sound

There may be a slight rattle, click or tick sound at the steering wheel area (Fig. 15) on some 2015 Colorado and Canyon models. Applying slight pressure, such as by resting your hand, on the center of the steering wheel … Continue reading

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Service Know-How

10215.03D – Emerging Issues March 12, 2014   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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Service Technical College – New Training Courses

Following are the latest service technical courses available to technicians through the GM Service Technical College.   For more information about available service training courses, log in to the GM Center of Learning at www.centerlearning.com and click the Catalog link. … Continue reading

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Bulletin Review – February 2014

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