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TOPIC : Chevy

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Sick Supercharger

This bulletin applies to 2014-current Chevy Camaro vehicles equipped with a 6.2L supercharged engine. Customers may experience a rattling or knocking noise at mid-to-high mph, and at idle. A screeching noise may also be heard at mid-to-high engine speed, usually when cold.

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Sooty Cruze

This bulletin applies to 2014-2015 Chevy Cruze vehicles equipped with a diesel engine. Some customers may comment on the MIL being illuminated. The technician may find DTC P22FA set current or in history. This condition may be caused by the nitrogen oxide sensor (NOX) covered with diesel particulates (soot).

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Stones Fool YAW Sensor

Some owners of 2014 Chevy Silverado 1500 vehicles may comment about a “Service Stabilitrac” message in the driver information center. During diagnosis, the technician may find DTC C0196-5A set in the ECM. 

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Mixed Up Coils?

Several GM vehicle models may feature two distinctively different-looking per-cylinder valve-cover-mounted ignition coils. This is due to a supplier difference and, according to GM, does not affect performance or serviceability.

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Dirty Diesel Deeds

Chevy and GMC vehicles equipped with LGH, LML, LUZ, LWN, L5P and LH7 diesel engines may exhibit excessive smoke at the tailpipe, with DTC P2002 set. This may be the result of a cracked or broken diesel particulate filter (DPF).

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Vette’s a Bit Rich

This bulletin applies to 2016-2019 Chevy Corvette models equipped with a 6.2L LT1/LT4/LT5 engine. The SES lamp may be on and rich running condition DTCs P0172 and P0175 may be stored. The possible cause involves the high pressure fuel pump.

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Funky Flexplate

Owners of 2014-2016 Chevy Corvettes equipped with a 6.2L LT1 or LT4 engine and automatic transmission may comment about a rattle noise heard from the bell housing area. If service manual diagnosis does not isolate the noise, the culprit may be the flexplate due to distortion or cracking.

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Fuel in Oil

This bulletin applies to 2013-2019 Chevy Malibu vehicles equipped with a 2.0L engine. The MIL may be on, accompanied by DTC P0172 (fuel trim system rich) set in the ECM. The condition may be caused by driving the vehicle in short intervals, allowing excess fuel to collect in the crankcase.

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Duramax Rear Water Seals

This bulletin applies to 2010-2012 Chevy Express and 2011-2012 Silverado 2500HD/3500 series trucks equipped with a 6.6L Duramax diesel engine. Some vehicles were involved in a mid-year change. Some may have been built with a flywheel housing that uses two different style seals (left side and right side seals are different).

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Loose Oil Tube

Some owners of 2006-2012 Chevy Corvette Z06 or 2009-2012 ZR1 models may comment on a rattle or tapping noise from under the hood.

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