Monthly Archives: August 2015

Keep the Field Product Reports Coming

Dealership employees play a key role in reporting product issues using the Field Product Reporting process (in Canada, referred to as the Product Information Reporting process). The timeliness and detailed information in these reports are extremely important to the product … Continue reading

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Automatic Java Updates and GM Service Applications

TIS2Web uses the Java program to launch GM Service Applications such as SPS, GDS2 and MDI Manager. Java acts as a “plug-in” that assists the programming code with executing functions. Since Java is a program itself that is owned and … Continue reading

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Transmission Downshifts during Normal Mode Powertrain Grade Braking

Fig 6   Powertrain Grade Braking is a transmission feature on 2013-2015 Avalanche, Silverado, Suburban, Tahoe, Express, Savana, Sierra, Yukon models and Escalade models equipped with the 6L80 (RPO MYC) or 6L90 (RPO MYD) automatic transmission and 2015 Colorado and … Continue reading

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Aftermarket Navigation Systems

Many aftermarket companies advertise modules that are designed to upgrade a non-navigation infotainment system to a navigation-enabled system on vehicles equipped with Chevrolet MyLink, GMC or Buick IntelliLink (Fig. 8) or Cadillac CUE infotainment systems. In many cases, the aftermarket … Continue reading

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Obtaining a TAC or PQC Case

GM dealership service managers who would like a copy of a GM Technical Assistance Center (TAC) or Product Quality Center (PQC) case covering an issue at their dealership, can now request one through a new process at TAC. The formal … Continue reading

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Low Air Conditioning Refrigerant Charge

Some 2013-2016 Traverse, Enclave, and Acadia models may have warm air conditioning. A check of the refrigerant level may reveal a very low/empty charge. After performing normal diagnostics, if the source of the refrigerant leak is not found, check for … Continue reading

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Disconnected RCDLR Antenna Conditions

Some 2015 Escalade models, Suburban, Tahoe, and Yukon models may have DTCs for any of the tire sensors — C0750 (Left Front Tire Pressure Sensor), C0755 (Right Front Tire Pressure Sensor), C0760 (Left Rear Tire Pressure Sensor), and/or C0765 (Right … Continue reading

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Trailer Brake Control Switch Wiring

An intermittent Service Trailer Brake message may be displayed on the Driver Information Center of some 2014 Silverado 1500 and Sierra 1500 models and 2015 Silverado and Sierra models. DTCs C1115 (Manual Trailer Brake Apply Request Switch Signal), C1116 (Manual … Continue reading

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New AFIT Tool Adapters Coming This Fall

Several new control modules on 2016 GM models use new sensor technology. The SAE J2716 SENT (Single Edge Nibble Transmission) protocol allows for high resolution data transmission from a sensor to a control module, such as readings for temperature, pressure, … Continue reading

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Updated Dealership Guidelines for Computers in the Service and Parts Departments

The GM Dealership Infrastructure Guidelines (version 15.2) have been updated recently with the hardware and software specifications required for GM dealerships to follow when purchasing new computers for use in the service and parts departments.   The most notable change … Continue reading

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Rear Leaf Spring Noises

A squeaking or clunking noise may be heard coming from the rear of some 2015 Colorado and Canyon models as well as late model full-size trucks. These noises have been traced to the rear suspension leaf spring area.   Do … Continue reading

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Low Oil Pressure on V8 Engines

A Service Engine Soon (SES) lamp may be illuminated or low oil pressure may be indicated on the instrument cluster with DTC P0521 (Engine Oil Pressure Sensor Performance) stored on some 2007-2013 CTS-V, Escalade, Avalanche, Camaro SS, Colorado, Corvette, Express, … Continue reading

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Track Engine Temperature on Track-Ready Corvettes

There may be some questions from owners of track-ready 2015-2016 Corvette Z06 models (equipped with the 6.2L engine – RPO LT4) regarding the hot temperature message. Here’s some information to relay to owners about Corvette track-ready vehicles and track engine … Continue reading

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Door Striker Cover Installation during PDI

Installation of the front and rear door striker covers is part of the Pre-Delivery Inspection (PDI) process for 2015-2016 Escalade models; 2015-2016 Tahoe LTZ, Suburban LTZ and Yukon Denali models. These covers are shipped with the vehicle from the assembly … Continue reading

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Instrument Panel Rattle Sounds

There are three areas that have been identified that may cause a rattle-type sound from the instrument panel area on some 2015 Escalade models, Silverado, Suburban, Tahoe, Sierra, Yukon; 2014 Silverado 1500 and Sierra 1500 models equipped with the 110 … Continue reading

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Service Driver Assist Message

On some 2015 Escalade, Silverado, Suburban, Tahoe, Sierra and Yukon models and 2014 Silverado 1500 and Sierra 1500 models equipped with the Safety Alert Seat, a Service Driver Assist Message may be displayed on the Driver Information Center. If the … Continue reading

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Service Know-How

10215.08D – Emerging Issues August 13, 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 – July 2015

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