Stop/Start and AutoStop Operation – 2014-2016 Chevrolet

NHTSA ID Number: 10116862

Manufacturer Communication Number: PI1426A

 

Summary

This preliminary informational bulletin provides Diagnostic Tips for Stop/Start and AutoStop Operation on vehicles that have a conditon of AutoStop mode not engaging and vehicle automaticlly restarts during a autostop event.

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Diagnostic Tip – Outside Temperature Will Not Update Or Inaccurate – 2014-2019 Buick Cadillac Chevrolet GMC

NHTSA ID Number: 10143456

Manufacturer Communication Number: PIT5232E

 

Summary

This Preliminary Information communication provides information to the technician the steps to diagnose and repair the concern of the display is showing 32° F (0° C) after a battery or reprogramming a module. The outside temperature will begin to update if driven above 20 mph for at least 5 minutes. If the vehicle speed drops below 20 mph, the timer will reset and the display will stop updating. Once the display starts to update it may take several more minutes of driving above 20 mph for the display to fully update. Also if the vehicle is shut off for more than 8 hours the display will update when the ignition is turned on.

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Unwanted Content Theft Alarm Sounds – 2015-2019 Cadillac Chevrolet & GMC

NHTSA ID Number: 10156946

Manufacturer Communication Number: PIT5379E

Summary

This Preliminary Information communication provides information to the technician about vehicles that may have a content theft alarm sounding for no apparent reason. Technician may use all published Service Information diagnostics and has not found the cause of the unwanted content theft alarm sounding. Technician should use Global Diagnostic System 2 to review the Body Control Module parameters for “Content Theft Deterrent Trigger History”. If the trigger is an Intrusion inspect for items hanging from the rear view mirror, solar powered dancing characters. When the trigger is a Glass breakage inspect the two rear quarter-panel windows and also in the liftgate glass. The quarter panel windows are attached to the body harness with a connector that looks similar to a 9 volt battery connector inspect them to be fully seated in on the glass. When the trigger is Ignition Voltage/Battery reconnect detected during a cold ambient temperature remote vehicle start event technician should call GM General Motors Technical Assistance Center.

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Excessive Oil Consumption – Perform Oil Consumption Test and/or Install Piston and Piston Ring Kit – 2010-2013 Buick Chevrolet GMC

NHTSA ID Number: 10163271

Manufacturer Communication Number: 130601003I

Summary

This technical bulletin provides Correction information to find the cause of oil consumption. Techs should perform an oil consumption test first, check for oil leaks and if rate of oil consumption is high, then replace the pistons and the rings.

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Intermittent Crank No Start With DTC P1682 – 2014-2015 Chevrolet Silverado & GMC Sierra

NHTSA ID Number: 10139388

Manufacturer Communication Number: PIT5253B

Summary

This Preliminary Information communication provides information to the technician about vehicles that may have an intermittent crank / no start concern. Technician may find a Diagnostic Trouble Code in the Engine Control Module P1682. Technician will need to follow published Service Information diagnostics for the Diagnostic Trouble Code. If Service Information diagnostics lead to a root cause of the concern technician should replace the Engine Controls Ignition Relay # 70 with part number 13595908.

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