The hazards: incorrect adjustment of the fuel injector flow rate may lead to the Chevy Silverado HD or GMC Sierra HD unit experiencing a rough engine idle as a result.

GM has issued a service update for a fix to a fuel injector flow rate issue affecting certain units of the 2020 through 2023 Cadillac CT4 sedan equipped with the turbocharged 2.7L I4 L3B gasoline ...

Flow Rate The amount of fuel that an injector delivers is determined by two factors: the length of time it's held open and the pressure of the fuel system. This flow is measured in pounds per hour.