Cold Start

2.5L LCV 6L50 MYB Rough Idle Or Vibration While In Gear After A Cold Start 800 to 1000 RPM And Or A Short Vibration At A Launch – 2019-2021 Chevrolet Colorado & GMC Canyon

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2021 Chevrolet Colorado

NHTSA ID Number: 10193431 Manufacturer Communication Number: PIP5743A   Summary This Preliminary information communicates to the dealer technician diagnostic tips for a vibration concern at low engine speeds. If using these diagnostics shows root cause of the vibration to be the transmission torque converter the torque converter should be replaced.     6 Affected Products Vehicles MAKE MODEL … Read more

Excessive Oil Smoke From the Exhaust On Cold Start – 2016 Cadillac ATS

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2016 Cadillac ATS

NHTSA ID Number: 10202386 Manufacturer Communication Number: PIP5680D Summary This Preliminary information communicates a concern with the intake manifold causing internal engine damage requiring engine and manifold replacement. This Preliminary information was updated to extend testing prior to engine replacement. This preliminary information was updated to refer to engine restriction PI and add possibility of part swaps. … Read more

Cold Start Rough Run, Misfire and/or Malfunction Indicator Lamp (MIL) Illuminated – 2017-2019 Chevrolet Silverado & GMC Sierra

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2019 Chevrolet Silverado

NHTSA ID Number: 10163238 Manufacturer Communication Number: 19NA108 Summary This technical bulletin provides a procedure to replace the head gaskets if found doubled stacked.   7 Affected Products Vehicles MAKE MODEL YEAR CHEVROLET SILVERADO 2017 CHEVROLET SILVERADO 2500 2018-2019 GMC SIERRA 2017 GMC SIERRA 2500 2018-2019 GMC SIERRA DENALI 2018   Parts GASKET, CYL HD Refer to … Read more

Information on Black Smoke, Rough Idle and Minimal Misfires on Cold Start – GM Passenger Cars and Light Duty Trucks

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2017 Buick Regal

NHTSA ID Number: 10198847 Manufacturer Communication Number: 19NA044   Summary This service bulletin provides information on the cold start control system in DI engines to reduce cold start emissions and improve fuel economy.     593 Affected Products Vehicles MAKE MODEL YEAR BUICK CASCADA 2016-2019 BUICK ENCLAVE 2008-2021 BUICK ENCORE 2013-2021 BUICK ENCORE GX 2020-2021 BUICK ENVISION … Read more

Various Engine Noises During Cold Start and Warm Engine Operation – 2014-2020 Cadillac Chevrolet GMC

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2019 Chevrolet Silverado

NHTSA ID Number: 10174305 Manufacturer Communication Number: 140604004F   Summary This informational bulletin explains the normal noises an engine may make when the ambient temperature outside is cold or the vehicle has sat for a few hours.   91 Affected Products Vehicles MAKE MODEL YEAR CADILLAC CTS 2016, 2018-2019 CADILLAC ESCALADE 2015-2020 CADILLAC ESCALADE ESV 2015-2020 CHEVROLET … Read more