Diagnostic Tips

Whistle Noise Heard from Engine Compartment, Rough Idle and/or DTC P0171 – 2011-2012 Chevrolet Cruze

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2012 Chevrolet Cruze

NHTSA ID Number: 10126352 Manufacturer Communication Number: PI0850A   Summary This preliminary informational bulletin provides repair information to correct a customer concern of a whistle noise heard from the engine compartment and/or the vehicle runs rough with the service engine light on and/or DTC P0171 set.   2 Affected Products Vehicle MAKE MODEL YEAR CHEVROLET CRUZE 2011-2012 … Read more

Rattle Squeak Clunk Thump Bump Noise from Front Suspension – 2007-2019 Cadillac Chevrolet GMC

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2019 Chevrolet Suburban

NHTSA ID Number: 10161036 Manufacturer Communication Number: PIT5049E Summary This Preliminary Information communication provides information to the technician on the steps to help diagnose and repair vehicles with a rattle, squeak, clunk, thump, or bump. If published Service Information diagnostics do not lead to a repair for the concern. Technician should inspect the opposite side shock/strut for … Read more

Unable To Communicate With The EBCM DTC U0121 – 2007-2015 Buick Cadillac Chevrolet GMC Pontiac Saturn

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2015 Chevrolet Camaro

NHTSA ID Number: 10127232 Manufacturer Communication Number: PIT4056H   Summary This Preliminary Information communication provides information to the technician on the steps to help diagnose and repair vehicles with a Antilock Braking System Malfunction Indicator Lamp on. Technician will find the scan tool will not communicate with the Electronic Brake Control Module. Technician will check the Yaw … Read more

Exhaust Fluid Quality Poor Message Displayed, Reductant Fluid Quality Test Status will Pass, Time Out, Fail or Interrupt – 2010-2016 Chevrolet & GMC with Duramax Diesel 6.6L Engine

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2016 Chevrolet Silverado

NHTSA ID Number: 10126345 Manufacturer Communication Number: PI1214B   Summary This preliminary informational bulletin provides service personnel with a guide to determine which SI documents and scan tool parameters to reference when encountering an: Exhaust Fluid Quality Poor message displayed, and a Reductant Fluid Quality Test status that will Pass, Time Out, Fail or Interrupt and other … Read more

Driver Information Center (DIC) Switch Buttons Are Inoperative – 2007-2017 Buick Chevrolet GMC Saturn

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General Motors

NHTSA ID Number: 10184104 Manufacturer Communication Number: PIT4534G Summary This Preliminary Information communication provides information to the technician about vehicle that have the Driver Information Center button inoperative. Technician will insure the connectors to the Instrument Panel Cluster and the DIC witch are connected and then remove the (IPC/DSPLY) fuse. Reinstall the fuse after a few seconds … Read more