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 …
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 …
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) …
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 …
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: Harsh shifting Shudder Surging Stalling Transmission …
