Diagnostic Tips

Diagnosing High Speed LAN Concerns – 2007-2014 Cadillac Chevrolet GMC Hummer

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2014 Cadillac Escalade

NHTSA ID Number: 10114600 Manufacturer Communication Number: PIT4667D Summary This Preliminary Information communication advises the technician of additional steps for diagnosing General Motors high speed local area network. This should only be used if normal service information doesn’t lead to a diagnosis this is not a replacement for normal service information.   107 Affected Products Vehicles MAKE … Read more

Advanced Diagnostics – Proactive Alert – 2015-2016 Cadillac Chevrolet GMC

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2016 Chevrolet Corvette

NHTSA ID Number: 10112820 Manufacturer Communication Number: PI1250D Summary This preliminat informational bulletin provides information on the proactive alert advanced diagnostics. Proactive Alert monitors the Engine Cranking system and the Fuel Delivery system and if either one of these monitored systems triggers certain performance issues, specific Customer and Dealer Communication are sent.   14 Affected Products Vehicles … Read more

Intermittent Audio/Display/Control and Resetting Concerns – 2014-2016 Buick Chevrolet GMC

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2015 Chevrolet Camaro

NHTSA ID Number: 10114880 Manufacturer Communication Number: PIC6106B Summary This Preliminary Information communication provides information to the technician about vehicles that may have the radio display that will go blank and come back on after a few seconds then display may show the splash screen or come back on to the last screen that was displayed. Technician … Read more

Service 4wd Message With DTC C0392 or C0396 Stored In TCCM – 2014-2018 Chevrolet GMC Cadillac

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2016 Chevrolet Silverado

NHTSA ID Number: 10144458 Manufacturer Communication Number: PIP5304B Summary This Preliminary Information communication provides information to the technician about vehicles that have a “Service 4WD Message” displayed in the Driver Information Center. Technician may find Diagnostic Trouble Codes C0392 or C0396. Technician should check the terminal tension on the Transfer Case Control Module X1 connector. Technician should … Read more

Slip or No Reverse or 3rd Gear, No Forward, DTC P0776 – 2008-2011 Buick Chevrolet GMC Pontiac Saturn

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2011 Chevrolet Equinox

NHTSA ID Number: 10113718 Manufacturer Communication Number: PI0780A   Summary This preliminary informational bulletin provides repair information to correct a customer concern of slip or no reverse or 3rd gear, no forward, MIL illuminated, DTC P0776 set.   16 Affected Products Vehicles MAKE MODEL YEAR BUICK LACROSSE 2010-2011 BUICK REGAL 2011 CHEVROLET CAPTIVA 2011 CHEVROLET CRUZE 2011 … Read more