NHTSA ID Number: 10222782 Manufacturer Communication Number: 20-NA-082 Summary This informational bulletin explains why more DEF is being used in diesel engines due to new emission standards.   Condition Some customers may comment that excessive DEF is being used. Some technicians may find no codes set or messages on the DIC.   Information The current 2020 Silverado/Sierra ... Read more

The post Information on Excessive Diesel Exhaust Fluid (DEF) Usage – 2019-2023 Cadillac Chevrolet GMC first appeard on GM - OEMDTC and is written by oemdtc

NHTSA ID Number: 10222798 Manufacturer Communication Number: 22-NA-060 Summary This informational bulletin provides a procedure to install an isolator over the valve cover if found missing and corrects the customers concern.   Condition Some customers may comment that they hear a tick or rattle type noise coming from the engine compartment – This noise may be noticeable ... Read more

The post Possible Tick or Rattle Noise Concern from Left and/or Right Side Rocker Cover – 2022 Cadillac Chevrolet GMC first appeard on GM - OEMDTC and is written by oemdtc

NHTSA ID Number: 10224283 Manufacturer Communication Number: PIT5883E Summary This Preliminary information communicates vehicles being built without certain options due to a parts shortage.   Condition This is an informational PI to bring awareness to certain vehicle options being disabled. Please be aware that some vehicles, identified by an RPO code, are built with the following option(s) ... Read more

The post Information On Vehicles Built With Heated And Vented Seats Disabled / Heated Steering Wheel Disabled / Front Rear Park Assist Disabled / Wheel Well Liners / Column Lock / Rocker Protectors / Express Up Rear Windows – 2022 Buick Cadillac Chevrolet GMC first appeard on GM - OEMDTC and is written by oemdtc

NHTSA ID Number: 10222669 Manufacturer Communication Number: 22-NA-183 Summary This informational bulletin advises the tech of a different tire/rim option that can be used to correct the customers concern.   Condition Some customers may comment on poor ride quality at highway speeds.   Cause This condition may be caused by tire inflation pressure that is high to ... Read more

The post 17 Wheels and QHQ Tires with Poor Ride Quality – 2020-2023 Chevrolet Silverado & GMC Sierra 2500HD/3500HD first appeard on GM - OEMDTC and is written by oemdtc

NHTSA ID Number: 10222668 Manufacturer Communication Number: 22-NA-182 Summary This informational bulletin advises the tech to check if the trans cooler lines are twisted which may cause the customers concern.   Condition Some customers may comment on one or more of the following before or after the transmission has been overhauled: Some customers may also comment on ... Read more

The post 6L80 6L90 8L90 10L80 10L90 10L000 Equipped Vehicles With A Harsh Shift Shudder Surge Stall Or High Transmission Fluid Temperature – 2021-2023 Cadillac Chevrolet GMC first appeard on GM - OEMDTC and is written by oemdtc