Monthly Archives: February 2015

Forward Collision Alert Operation and Timing Settings

Fig 1   The Forward Collision Alert (FCA) system (RPO UEU) available on the 2013-2015 Equinox and Terrain is designed to help drivers avoid or reduce the harm caused by front-end crashes. When approaching a vehicle ahead too quickly, the … Continue reading

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Fuel Gauge Does Not Read Full

The fuel gauge may not read full, instead only reading 7/8 full (Fig. 7), after filling the fuel tank on some 2013-2015 LaCrosse, Regal, XTS, and Malibu models. This condition may be caused by build variation of the fuel level … Continue reading

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Maximizing Heating Performance

In extremely cold ambient temperatures, the small displacement energy efficient engines — the 1.2L L4 engine (RPO LL0), 1.4L L4 engine (RPO LUJ, LUV) and 1.8L L4 engine (RPO 2H0, LUW, LWE) — available in the 2011-2015 Cruze, 2012-2015 Sonic, … Continue reading

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UPDATE: New Door Latch Design

The door latch on the 2015 Colorado and Canyon features a new design that operates differently from the previous common GM design. This new latch design also is used on 2014 Silverado 1500 and Sierra 1500; 2015 Silverado and Sierra; … Continue reading

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Inoperative Rear Camera or Radio

On some 2014-2015 SRX models, the rear camera or radio may be inoperative. DTC B127B sym2B (Rearview Camera Input Signal Circuit Missing Reference) may be set in the Human Machine Interface (HMI) control module.   If this condition is present, … Continue reading

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Aftermarket Equipment Connected to Multi-Media/Auxiliary Ports during Diagnosis

When diagnosing any infotainment system conditions, including blank displays, flashing displays, error or update failed messages, the navigation map not loading, Bluetooth concerns or USB concerns, on some 2013-2015 ATS, CTS, SRX, and XTS models equipped with CUE infotainment systems; … Continue reading

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Interior Rattle Sound when Idling in Reverse or Drive

A rattle or buzz sound may be heard inside the passenger compartment while the vehicle is idling with the automatic transmission in Reverse or Drive on some 2012-2014 Camaros equipped with the 3.6L V6 engine (RPO LFX). This sound is … Continue reading

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High-Pitched Sound in Auto 4WD

A high-pitched whine sound may be noticed when driving some 2014-2015 Silverado, Sierra; 2015 Suburban, Tahoe, Yukon models and Escalade models in Auto 4WD (RPO NQH or NP0). The sound is intermittent with no noticeable pattern.   The Transfer Case … Continue reading

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New Trax Added to Chevrolet’s 2015 U.S. Lineup

Fig 1   The all-new 2015 Trax, now Chevrolet’s smallest SUV, offers the agility of a compact car with a 100.6-inch wheelbase, but with up to 48.4 cubic feet of cargo space in three trim levels: LS, LT and LTZ. … Continue reading

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Identifying Aftermarket Calibrations before Warranty Repairs

When alterations to GM engine or transmission control module calibrations are made by owners, it may subject powertrain and driveline components (the engine, transmission, transfer case, driveshaft and rear axle) to stresses that were not tested by GM. These unknown … Continue reading

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Infotainment Display Screen Conditions

On some 2015 LaCrosse, Regal, ATS, CTS Sedan (VIN A), Escalade models (with RPO AVF), SRX, XTS, Colorado, Corvette, Impala (VIN 1), Silverado, Suburban (with RPO AVF), Tahoe (with RPO AVF), Canyon, Sierra, and Yukon models (with RPO AVF) equipped … Continue reading

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XM Audio, Radio Lock-Up and other Audio Conditions

There may be several radio conditions present on some 2015 LaCrosse, Regal, ATS, CTS sedan (VIN A), ELR, Escalade models, SRX, XTS, Corvette, Impala (VIN 1), Silverado, Suburban, Tahoe, Sierra, and Yukon models equipped with infotainment system RPOs IO3, IO4, … Continue reading

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Techline Infotainment DVD Software Update

There may be several infotainment system conditions, such as a blank screen after startup, inoperable touch screen, and Bluetooth and navigation issues, on some 2013 ATS, SRX, XTS; 2014 LaCrosse, Regal, CTS sedan, ELR, Corvette, Impala, Silverado 1500, Sierra 1500; … Continue reading

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Incorrect Door Latch Rod

After unlocking some 2012-2015 LaCrosse models, equipped with the Passive Entry Passive Start (PEPS) Keyless Start system (RPO ATH), using the Unlock button on the key fob, the vehicle may not respond when pressing the Engine Start button.   The … Continue reading

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GDS 2 Enhances Vehicle Selection Functionality

The Global Diagnostic System (GDS) 2 recently received several enhancements with the latest core application update. The new functions make it easier for technicians to select and build a vehicle in GDS 2.   Look for these new functions in … Continue reading

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Techlink Engine Oil Capacities

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Service Know-How

10215.02D – Emerging Issues February 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 – January 2015

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