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Information on Transmission Flares, Slipping, Gear Hunting, Harsh Shifting, Only Shifts at Wide Open Throttle (WOT) or Hard Acceleration, Rolling in Reverse or in Wrong Direction Selected, High Engine RPM, Shift Busyness, Surging While Cruising, Will Not Upshift, Holds in a Lower Gear, Will Not Back Up Hills, Not Shifting, Jerks and/ or Loss of Power – 2019-2021 Buick Chevrolet

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2021 Chevrolet Trailblazer

NHTSA ID Number: 10187768 Manufacturer Communication Number: 21NA004   Summary This service bulletin provides information explaining possible normal CVT automatic transmission performance.   6 Affected Products Vehicles MAKE MODEL YEAR BUICK ENCORE GX 2020-2021 CHEVROLET MALIBU 2019-2021 CHEVROLET TRAILBLAZER 2021     SEOCONTENT-START   Service Bulletin Bulletin No.: 21-NA-004 Date: January, 2021 INFORMATION Subject: Information on Transmission … Read more

Information on Diesel Engine Soot Deposits at the Variable Turbine Geometry (VGT) Pin – 2017-2019 Chevrolet Cruze & GMC Equinox & Terrain

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2019 GMC Terrain

NHTSA ID Number: 10187377 Manufacturer Communication Number: 17NA334   Summary This informational bulletin explains a normal condition caused by exhaust soot blowing by the VGT pivot seal.   7 Affected Products Vehicles MAKE MODEL YEAR CHEVROLET CRUZE 2017-2019 CHEVROLET EQUINOX 2018-2019 GMC TERRAIN 2018-2019     SEOCONTENT-START Service Bulletin Bulletin No.: 17-NA-334 Date: December, 2020 INFORMATION Subject: … Read more

Warranty Administration – Pre-Repair Authorization (PRA) Process and Information – GM Passenger Cars and Light Duty Trucks

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2021 Chevrolet Corvette

NHTSA ID Number: 10219284 Manufacturer Communication Number: 18-NA-306 Summary This Warranty Administration service bulletin provides information for dealers/Service advisors on when and how to submit a Pre-Repair Authorization (PRA).   746 Affected Products Vehicles MAKE MODEL YEAR BUICK CASCADA 2016-2019 BUICK ENCLAVE 2011-2023 BUICK ENCORE 2013-2022 BUICK ENCORE GX 2020-2022 BUICK ENVISION 2016-2022 BUICK LACROSSE 2011-2020 BUICK … Read more

Engineering Information – Check Engine Lamp Illuminated, Transmission Does Not Shift Properly and/or DTC P0796 Set – 2019-2020 Chevrolet Silverado & GMC Sierra 1500

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2020 Chevrolet Silverado 1500

NHTSA ID Number: 10183783 Manufacturer Communication Number: PIE0556A   Summary This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the transmission.   SEOCONTENT-START Subject: Engineering Information – Check Engine Lamp Illuminated, Transmission Does Not Shift Properly and/or DTC P0796 Set This PI has … Read more

Engineering Information – Leak from Transmission Front Input Shaft Seal and/or Rear Main Shaft Seal – 2016-2020 Chevrolet Camaro

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2020 Chevrolet Camaro

NHTSA ID Number: 10183784 Manufacturer Communication Number: PIE0561A   Summary This engineering information (EI) closure ends the need for information from the field in regards to a leak from the Transmission Front Input Shaft Seal and/or Rear Main Shaft Seal.   SEOCONTENT-START Subject: Engineering Information – Leak from Transmission Front Input Shaft Seal and/or Rear Main Shaft … Read more