Information on Excessive Diesel Exhaust Fluid (DEF) Usage – 2019-2023 Cadillac Chevrolet GMC
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 …