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: 10222800 Manufacturer Communication Number: 22-NA-154 Summary This informational bulletin is for Korea to see normal operation of A/C compressor. Condition Some customers may comment on the following: A/C compressor may intermittently exhibit higher than usual levels of noise and vibration Occasionally a booming sound may be heard between 1500 to 2000 engine RPM …
NHTSA ID Number: 10222837 Manufacturer Communication Number: 22-NA-193 Summary This informational bulletin explains to the tech on where to look for a possible concern with the rockers causing the MIL to illuminate. Condition Some customers may comment that the MIL is illuminated. Some technicians may find one or more of the following codes set in the …
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: 10222670 Manufacturer Communication Number: 22-NA-184 Summary This informational bulletin advises the technician of possibly installing the incorrect 1-2-7-8-R clutch fluid passage seal and which seal should be used with measurements of the seal. Condition Technician’s may find a no movement condition after replacement of the valve body on the 8L45 or 8L90 automatic …
