Identifying Non-GM ECM Calibration Use and Power-up Hardware Detection in Duramax Diesel Engines Using GDS 2 – 2019-2023 Cadillac Chevrolet GMC

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General Motors

NHTSA ID Number: 10222660 Manufacturer Communication Number: 20-NA-090 Summary This informational bulletin provides a way for the technician to identify if the ECM has been modified.   General Motors Position on Aftermarket Power-Up Devices General Motors does not support or endorse the use of devices or modifications that when installed, increase the engine horsepower and torque. This … Read more

Creak Click Pop Crack Type Noise From Front Suspension/Frame Area While Making Turns – 2015-2020 Cadillac Chevrolet GMC

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2020 Chevrolet Tahoe

NHTSA ID Number: 10178382 Manufacturer Communication Number: PIT5533C   Summary This Preliminary Information communication provides information to the technician about vehicles that have a creak, click, pop, and or crack type noise from the front suspension or front frame area while making tight turns. Technician will need to loosen and then re-torque the four front frame cross … Read more

GF9 9T45/50/60/65 Transmission Fluid Leak – 2020 Buick Cadillac Chevrolet GMC

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2020 Chevrolet Blazer

NHTSA ID Number: 10178388 Manufacturer Communication Number: PIP5720A   Summary This Preliminary information communicates that a possible trans fluid leak found may only be residual fluid that was left during the assembly process with no repairs needed if no dye is detected after cleaning and re-evaluation.   10 Affected Products Vehicles MAKE MODEL YEAR BUICK ENCORE 2020 BUICK … Read more

Information on Head-Up Display (HUD) on Model Year 2017 and Newer Vehicles – Rotational Feature that Allows for Adjusting of Angle of HUD Image – 2017-2020 Buick Cadillac Chevrolet GMC

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2020 Chevrolet Corvette

NHTSA ID Number: 10178255 Manufacturer Communication Number: 19NA010   Summary This informational bulletin provides information for dealers/technicians on Head-Up Display (HUD) on Vehicles Model Year 2017 and Newer Having Rotational Feature that Allows for Adjusting of Angle of HUD Image.   47 Affected Products Vehicles MAKE MODEL YEAR BUICK ENVISION 2018-2020 CADILLAC ATS 2017-2019 CADILLAC CT6 2017-2019 … Read more

Forward Collision/Active Safety System Inoperative, No Messages or Alerts, DTC’s B390A 45, B390A 58 and/or DTC B390A 67 are set – 2016-2020 Cadillac Escalade

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2020 Cadillac Escalade

NHTSA ID Number: 10178256 Manufacturer Communication Number: 19NA071   Summary This technical bulletin provides repair information to correct a customer concern of forward collision/active safety system inoperative, no messages or alerts. Technician may find DTC?s B390A?45, B390A?58 and/or DTC?B390A?67 are set.   10 Affected Products Vehicles MAKE MODEL YEAR CADILLAC ESCALADE 2016-2020 CADILLAC ESCALADE ESV 2016-2020   … Read more